Why was germany's split between proestan in the north and catholics in the south inportant

Because the Catholics were frusurated that to many people in half of Germany wanted to be Protestant, and they couldn't really have power over them so they decided to not to expose the South (who they had power over) to the North (protestant) who had more freedom. 

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations.