The imrpoved agricultural techniques, such as the three field system, the climate change, and the horse plows. These effected Western Europe during the middle ages because the three field system produced better crops, the climate opened more land to farming, and the horse plows allowed faster harvesting. This made life a lot easier for farmers.
San Juan Hill is the answer
Strom Thurmond did not challenge the status quo.
Thurgood Marshall argued cases like <em>Brown v. The Board of Education </em>before the US Supreme Court, and later (in 1967) became a Supreme Court justice -- the first African-American justice to serve on the court.
As president, Harry Truman signed Executive Order 9981, which abolished racial segregation in the US military.
Jackie Robinson was the first black player to play in Major League Baseball.
Strom Thurmond was a US Senator from South Carolina who sought to protect the status quo against the civil rights movement.
