system (e.g. political, adminstrative etc) · institution

Communism is the system practiced in the Soviet Union.

They changed the system.

For a long time, society was strongly hierarchical and unequal, primarily composed of peasants. The most backward, impoverished segment of the population, they were crushed by the weight of taxes, wars, and famines.

She was born just a generation past slavery. A time when there were no cars on the road or planes in the sky, when someone like her couldn't vote for two reasons: because she was a woman, and because of the color of her skin.

Lincoln was opposed to slavery.