It showed that the supreme court could regulate interstate commerce
Personally, I would choose a bayonet in a hand to hand combat fight. Rifles are just for a far distance. If the person is close to you they can easily take it from you but then if it's a bayonet and you know how to use it then they won't take it from you unless they are some bad a** people.
Movements to reform prisons and mental hospitals.
South America was mainly colonized by Spain, whose main goal was to spread Catholicism to "save" the native people.