A period of widespread social activism and political reform across the United States, from the 1890s to 1920s.

Those who advocate for the sustainable use and management of natural resources including wildlife, water, air, and earth deposits, both -- renewable and non-renewable.

A viewpoint or ideology associated with free political institutions and religious toleration, as well as support for a strong role of government in regulating capitalism and constructing the welfare state.

A nationwide constitutional ban on the production, importation, transportation and sale of alcoholic beverages that remained in place from 1920 to 1933.

A policy of extending a country's power and influence through diplomacy or military force.

A category of foreign policies institutionalized by leaders who asserted that their nations' best interests were best served by keeping the affairs of other countries at a distance.

The process of assimilating American character, manner, ideals, culture, and so on.

The women's right to vote, granted by the 19th amendment to the U.S. Constitution (1920).

A nationwide constitutional ban on the production, importation, transportation and sale of alcoholic beverages that remained in place from 1920 to 1933.

Those who attempt to maintain in their present condition areas of the Earth that are so far untouched by humans.

Those who advocate for the sustainable use and management of natural resources including wildlife, water, air, and earth deposits, both -- renewable and non-renewable.

Those who attempt to maintain in their present condition areas of the Earth that are so far untouched by humans.

Those who advocate for the sustainable use and management of natural resources including wildlife, water, air, and earth deposits, both -- renewable and non-renewable.

Those who advocate for the sustainable use and management of natural resources including wildlife, water, air, and earth deposits, both -- renewable and non-renewable.

Those who attempt to maintain in their present condition areas of the Earth that are so far untouched by humans.

An official who examines publications, mail, literature, and so forth in order to remove or prohibit the distribution of material deemed dangerous or offensive.

A system whereby the government undertakes to protect the health and well-being of its citizens, especially those in financial or social need, by means of grants, pensions, and other benefits. The foundations for the modern welfare state in the US were laid by the New Deal programs of President Franklin D. Roosevelt.

The movement of 6 million African-Americans out of the rural Southern United States to the urban Northeast, Midwest, and West that occurred between 1910 and 1970.

A viewpoint or ideology associated with free political institutions and religious toleration, as well as support for a strong role of government in regulating capitalism and constructing the welfare state.

A category of foreign policies institutionalized by leaders who asserted that their nations' best interests were best served by keeping the affairs of other countries at a distance.

A viewpoint or ideology associated with free political institutions and religious toleration, as well as support for a strong role of government in regulating capitalism and constructing the welfare state.

An authoritarian and nationalistic right-wing system of government and social organization.

A political system where the state recognizes no limits to its authority and strives to regulate every aspect of public and private life wherever feasible.

Diversified media technologies that are intended to reach a large audience by mass communication.

The movement of 6 million African-Americans out of the rural Southern United States to the urban Northeast, Midwest, and West that occurred between 1910 and 1970.

Separation of people based on racial, ethnic, or other differences. Common in the South after the Civil War through the 1960s.

A category of foreign policies institutionalized by leaders who asserted that their nations' best interests were best served by keeping the affairs of other countries at a distance.

An intergovernmental organization founded on 10 January 1920 as a result of the Paris Peace Conference that ended the First World War. It lacked an armed force to enforce policy and was not joined by the United States.

The movement of 6 million African-Americans out of the rural Southern United States to the urban Northeast, Midwest, and West that occurred between 1910 and 1970.

A category of foreign policies institutionalized by leaders who asserted that their nations' best interests were best served by keeping the affairs of other countries at a distance.

A policy of extending a country's power and influence through diplomacy or military force.

An intergovernmental organization founded on 10 January 1920 as a result of the Paris Peace Conference that ended the First World War. It lacked an armed force to enforce policy and was not joined by the United States.

A category of foreign policies institutionalized by leaders who asserted that their nations' best interests were best served by keeping the affairs of other countries at a distance.

A policy of extending a country's power and influence through diplomacy or military force.

An intergovernmental organization founded on 10 January 1920 as a result of the Paris Peace Conference that ended the First World War. It lacked an armed force to enforce policy and was not joined by the United States.

A conflict fought between Spain and the United States in 1898. Hostilities began in the aftermath of sinking of the USS Maine in Havana harbor leading to American intervention in the Cuban War of Independence.

One of the peace treaties at the end of World War I. It ended the state of war between Germany and the Allied Powers. Signed on 28 June 1919, exactly five years after the assassination of Archduke Franz Ferdinand.

A political system where the state recognizes no limits to its authority and strives to regulate every aspect of public and private life wherever feasible.

One of the peace treaties at the end of World War I. It ended the state of war between Germany and the Allied Powers. Signed on 28 June 1919, exactly five years after the assassination of Archduke Franz Ferdinand.

An intergovernmental organization founded on 10 January 1920 as a result of the Paris Peace Conference that ended the First World War. It lacked an armed force to enforce policy and was not joined by the United States.

U.S., Britain, France, which were allied before and during World War II.

A guarded compound for the detention or imprisonment of aliens, members of ethnic minorities, political opponents. Primarily Jewish Europeans during WWII.

An intergovernmental organization founded on 10 January 1920 as a result of the Paris Peace Conference that ended the First World War. It lacked an armed force to enforce policy and was not joined by the United States.

A political system where the state recognizes no limits to its authority and strives to regulate every aspect of public and private life wherever feasible.

A political system where the state recognizes no limits to its authority and strives to regulate every aspect of public and private life wherever feasible.

An authoritarian and nationalistic right-wing system of government and social organization.

An authoritarian and nationalistic right-wing system of government and social organization.

A political system where the state recognizes no limits to its authority and strives to regulate every aspect of public and private life wherever feasible.

Germany, Italy, and Japan, which were allied before and during World War II.

U.S., Britain, France, which were allied before and during World War II.

U.S., Britain, France, which were allied before and during World War II.

Germany, Italy, and Japan, which were allied before and during World War II.

A military strategy employed by the Allies in the Pacific War against Japan and the Axis powers during World War II. The idea was to bypass heavily fortified Japanese positions and instead concentrate the limited Allied resources on strategically important islands that were not well defended but capable of supporting the drive to the main islands of Japan.

The landing operations on Tuesday, 6 June 1944 of the Allied invasion of Normandy in Operation Overlord during World War II.

The landing operations on Tuesday, 6 June 1944 of the Allied invasion of Normandy in Operation Overlord during World War II.

A military strategy employed by the Allies in the Pacific War against Japan and the Axis powers during World War II. The idea was to bypass heavily fortified Japanese positions and instead concentrate the limited Allied resources on strategically important islands that were not well defended but capable of supporting the drive to the main islands of Japan.

Toyko

Hiroshima

Nagasaki

Kyoto

Nagoya

The process of assimilating American character, manner, ideals, culture, and so on.

A viewpoint or ideology associated with free political institutions and religious toleration, as well as support for a strong role of government in regulating capitalism and constructing the welfare state.

Those who attempt to maintain in their present condition areas of the Earth that are so far untouched by humans.

A disparaging term for the small nations of Central America, with particular reference to their political instability and poor, single-crop economies.

The territory of weaker states where a powerful state exercises the dominant control.

In politics, the act of dividing a weaker territory or government among several more powerful states.

A disparaging term for the small nations of Central America, with particular reference to their political instability and poor, single-crop economies.

The territory of weaker states where a powerful state exercises the dominant control.

In politics, the act of dividing a weaker territory or government among several more powerful states.

A disparaging term for the small nations of Central America, with particular reference to their political instability and poor, single-crop economies.

The territory of weaker states where a powerful state exercises the dominant control.

In politics, the act of dividing a weaker territory or government among several more powerful states.

In politics, one who believes in continuing progress, improvement, or reform.

Those who advocate for the sustainable use and management of natural resources including wildlife, water, air, and earth deposits, both -- renewable and non-renewable.

Those who attempt to maintain in their present condition areas of the Earth that are so far untouched by humans.

In politics, the nomination of a party's candidates for office through a special election of that party's voters.

In politics, the procedure whereby voters can, through petition, present proposed legislation directly to the electorate.

The submission of a law, proposed or already in effect, to a direct vote of the electorate.

In politics, a procedure for removing an official from office through popular election or other means.

In politics, the nomination of a party's candidates for office through a special election of that party's voters.

In politics, the procedure whereby voters can, through petition, present proposed legislation directly to the electorate.

The submission of a law, proposed or already in effect, to a direct vote of the electorate.

In politics, a procedure for removing an official from office through popular election or other means.

In politics, the nomination of a party's candidates for office through a special election of that party's voters.

In politics, the procedure whereby voters can, through petition, present proposed legislation directly to the electorate.

The submission of a law, proposed or already in effect, to a direct vote of the electorate.

In politics, a procedure for removing an official from office through popular election or other means.

In politics, the nomination of a party's candidates for office through a special election of that party's voters.

In politics, the procedure whereby voters can, through petition, present proposed legislation directly to the electorate.

The submission of a law, proposed or already in effect, to a direct vote of the electorate.

In politics, a procedure for removing an official from office through popular election or other means.

In politics, the nomination of a party's candidates for office through a special election of that party's voters.

In politics, the procedure whereby voters can, through petition, present proposed legislation directly to the electorate.

In politics, the right of a people (usually based on ethnicity) to shape its own national identity and form a government, without outside coercion of influence.

In politics, a procedure for removing an official from office through popular election or other means.

A tax on income in which the taxation rates are progressively higher for those whit higher income.

A forcible tax or other imposition.

A tax on income in which the taxation rates are progressively higher for those whit higher income.

A forcible tax or other imposition.

A disparaging term for the small nations of Central America, with particular reference to their political instability and poor, single-crop economies.

A small territory surrounded by foreign or hostile territory. Enclaves were common among newly-arrived immigrant groups (e.g. "Chinatown" in San Francisco).

The territory of weaker states where a powerful state exercises the dominant control.

Re-established the authority of the federal government to fight monopolies under the Sherman Anti-Trust Act.

First case to use the "Brandeis brief"; recognized a 10-hour work day for women laundry workers on the grounds of health and community concerns.

Unanimously upheld the Espionage Act of 1917 which declared that people who interfered with the war effort were subject to imprisonment; declared that the 1st Amendment right to freedom of speech was not absolute; free speech could be limited if its exercise presented a "clear and present danger."

The court upheld the constitutionality of detention camps for Japanese-Americans during World War 2.

Re-established the authority of the federal government to fight monopolies under the Sherman Anti-Trust Act.

First case to use the "Brandeis brief"; recognized a 10-hour work day for women laundry workers on the grounds of health and community concerns.

Unanimously upheld the Espionage Act of 1917 which declared that people who interfered with the war effort were subject to imprisonment; declared that the 1st Amendment right to freedom of speech was not absolute; free speech could be limited if its exercise presented a "clear and present danger."

The court upheld the constitutionality of detention camps for Japanese-Americans during World War 2.

Re-established the authority of the federal government to fight monopolies under the Sherman Anti-Trust Act.

First case to use the "Brandeis brief"; recognized a 10-hour work day for women laundry workers on the grounds of health and community concerns.

Unanimously upheld the Espionage Act of 1917 which declared that people who interfered with the war effort were subject to imprisonment; declared that the 1st Amendment right to freedom of speech was not absolute; free speech could be limited if its exercise presented a "clear and present danger."

The court upheld the constitutionality of detention camps for Japanese-Americans during World War 2.

Re-established the authority of the federal government to fight monopolies under the Sherman Anti-Trust Act.

First case to use the "Brandeis brief"; recognized a 10-hour work day for women laundry workers on the grounds of health and community concerns.

Unanimously upheld the Espionage Act of 1917 which declared that people who interfered with the war effort were subject to imprisonment; declared that the 1st Amendment right to freedom of speech was not absolute; free speech could be limited if its exercise presented a "clear and present danger."

The court upheld the constitutionality of detention camps for Japanese-Americans during World War 2.

The policy that China should be open to trade with all of the major powers, and that all, including the United States, should have equal right to trade there. This was the official American position toward China as announced by Secretary of State John Hay in 1899.

A government legislation that limited the number of immigrants from Europe which was set at 3% of the nationality currently in the U.S. It greatly limited the number of immigrants who could move to the U.S. And it reflected the isolationist and anti-foreign feeling in America as well as the departure from traditional American ideals.

Idealistic agreement signed in 1928 in which nations agreed not to pose the threat of war against one another.

The policy that China should be open to trade with all of the major powers, and that all, including the United States, should have equal right to trade there. This was the official American position toward China as announced by Secretary of State John Hay in 1899.

A government legislation that limited the number of immigrants from Europe which was set at 3% of the nationality currently in the U.S. It greatly limited the number of immigrants who could move to the U.S. And it reflected the isolationist and anti-foreign feeling in America as well as the departure from traditional American ideals.

Idealistic agreement signed in 1928 in which nations agreed not to pose the threat of war against one another.

The policy that China should be open to trade with all of the major powers, and that all, including the United States, should have equal right to trade there. This was the official American position toward China as announced by Secretary of State John Hay in 1899.

A government legislation that limited the number of immigrants from Europe which was set at 3% of the nationality currently in the U.S. It greatly limited the number of immigrants who could move to the U.S. And it reflected the isolationist and anti-foreign feeling in America as well as the departure from traditional American ideals.

Idealistic agreement signed in 1928 in which nations agreed not to pose the threat of war against one another.

Forbade the manufacture or sale of mislabeled or adulterated food or drugs, it gave the government broad powers to ensure the safety and efficacy of drugs in order to abolish the "patent" drug trade. Still in existence as the FDA.

The policy that China should be open to trade with all of the major powers, and that all, including the United States, should have equal right to trade there. This was the official American position toward China as announced by Secretary of State John Hay in 1899.

A government legislation that limited the number of immigrants from Europe which was set at 3% of the nationality currently in the U.S. It greatly limited the number of immigrants who could move to the U.S. And it reflected the isolationist and anti-foreign feeling in America as well as the departure from traditional American ideals.

Idealistic agreement signed in 1928 in which nations agreed not to pose the threat of war against one another.

Forbade the manufacture or sale of mislabeled or adulterated food or drugs, it gave the government broad powers to ensure the safety and efficacy of drugs in order to abolish the "patent" drug trade. Still in existence as the FDA.

Twenty-sixth president of the United States; he focused his efforts on trust busting, environment conservation, and strong foreign policy.

(1856-1924) President of the United States (1913-1921) and the leading figure at the Paris Peace Conference of 1919. He was unable to persuade the U.S. Congress to ratify the Treaty of Versailles or join the League of Nations.

Republican president at the outset of the Great Depression. As a Republican, he believed that the federal government should not interfere in economic problems; the severity of the Great Depression forced his hand to provide some federal assistance to those in need, but he mostly left these efforts to the states.

27th president of the U.S.; he angered progressives by moving cautiously toward reforms and by supporting the Payne-Aldrich Tariff; he lost Roosevelt's support and was defeated for a second term.

Twenty-sixth president of the United States; he focused his efforts on trust busting, environment conservation, and strong foreign policy.

(1856-1924) President of the United States (1913-1921) and the leading figure at the Paris Peace Conference of 1919. He was unable to persuade the U.S. Congress to ratify the Treaty of Versailles or join the League of Nations.

Republican president at the outset of the Great Depression. As a Republican, he believed that the federal government should not interfere in economic problems; the severity of the Great Depression forced his hand to provide some federal assistance to those in need, but he mostly left these efforts to the states.

27th president of the U.S.; he angered progressives by moving cautiously toward reforms and by supporting the Payne-Aldrich Tariff; he lost Roosevelt's support and was defeated for a second term.

Twenty-sixth president of the United States; he focused his efforts on trust busting, environment conservation, and strong foreign policy.

(1856-1924) President of the United States (1913-1921) and the leading figure at the Paris Peace Conference of 1919. He was unable to persuade the U.S. Congress to ratify the Treaty of Versailles or join the League of Nations.

Republican president at the outset of the Great Depression. As a Republican, he believed that the federal government should not interfere in economic problems; the severity of the Great Depression forced his hand to provide some federal assistance to those in need, but he mostly left these efforts to the states.

27th president of the U.S.; he angered progressives by moving cautiously toward reforms and by supporting the Payne-Aldrich Tariff; he lost Roosevelt's support and was defeated for a second term.

Twenty-sixth president of the United States; he focused his efforts on trust busting, environment conservation, and strong foreign policy.

(1856-1924) President of the United States (1913-1921) and the leading figure at the Paris Peace Conference of 1919. He was unable to persuade the U.S. Congress to ratify the Treaty of Versailles or join the League of Nations.

Republican president at the outset of the Great Depression. As a Republican, he believed that the federal government should not interfere in economic problems; the severity of the Great Depression forced his hand to provide some federal assistance to those in need, but he mostly left these efforts to the states.

27th president of the U.S.; he angered progressives by moving cautiously toward reforms and by supporting the Payne-Aldrich Tariff; he lost Roosevelt's support and was defeated for a second term.