Why was Darwin's theory controversial in the 1800s?

How w.e.b. dubois wanted to improve the social and economic situation that existed for african americans during the early 19th century?

Why was the agricultural revolution more successful in england than in the rest of europe?

What two different approaches did the knights of labor and the american federation of labor take in building a union organization? a) the knights of labor accepted only unskilled workers; the american federation of labor accepted only skilled workers. b) the knights of labor accepted skilled and unskilled workers; the american federation of labor accepted only skilled workers.c) the knights of labor refused to accept african american or chinese workers; the american federation of labor accepted all workers.d) the knights of labor accepted workers from a single industry; the american federation of labor accepted workers from several industries.