What function does an artwork have if it intends to convince people to join a protest?

What functions do an artwork have if it intends to entertain people?

What function does an artwork have if it intends to provide some service?

What functions do plays have?

This philosopher said that the type of art we have on Earth could give us an idea of what could be in the "World of Forms".

This philosopher said that art could help us achieve social unity.

This philosopher said that the way we look at art is somehow universal.

This philosopher said that art could give us a sense of pleasure.

This philosopher is suspicious of our arts and artists because they lean more toward just the imitations of things rather than pursue for what is real in the "World of Forms".