Which aspect of u. s. politics is most closely tired to the concept of direct democracy?

In 1637, colonists killed between 500 and 600 american indians in connecticut

Political rights for women grew most rapidly on the western frontier primarily because (1) the settlers were influenced by native american indian societies (2) women greatly outnumbered men in the west (3) pioneer life often required men and women to share responsibilities equally (4) immigrants settling in the west brought ideals of gender equality from europe

What are some effects outside of europe because of world war 1?