The bison were exterminated due to rising of cattle culture across Great Plains and the west. With guns becoming popular in their existence the killing of buffalo became easier. Even with the native Americans who were gaining knowledge and some experience with guns. Buffalo were free range, while the government wanted control. We wanted a say over land, over every species, and eventually, through the years our government has done that.
Mayflower Compact was the FIRST example of a written agreement
President Franklin D. Roosevelt issued the Fair Employment Act or Executive Order 8802. It was the first national action, though not a law, to encourage equal opportunity and ban employment discrimination in the United States. The executive order was issued in reply to force from civil rights activists A. Philip Randolph, Walter White, and others concerned in the March on Washington Movement who had intended a march on Washington, D.C. in 1941 to dispute racial discrimination in industry and the military. They suspended the march after Executive Order 8802 was issued.
A secular leader can be any leader that does not allow the church to interfere with the business of the country. Secularization is separating the church from the state, so a secular American leader can be pretty much anyone from recent history like Obama, or Bush, or Reagan, or even Kennedy who although sometimes attacked for his Catholicism, was still secular and did not mix his beliefs with the state.