Isolationism was the policy that kept them from joining the League of Nations. Isolationism is when a group stays away from or ignores all people in that group. Mainly political matters of other countries.
Booker T. Washington spent his early childhood in slavery. Following emancipation, Washington (like many Blacks) felt that an education was the best way to improve his living standards, so he wanted to educate himself to improve his life.
It depends what system you are talking about
Sites on the Trail include the Park Street Church, Granary Burying Ground, King's Chapel, Old Corner Book Store, Old State House, Faneuil Hall, Paul Revere House, The Old North Church, USS Constitution, and Bunker Hill Monument.