The key cause was economic hardship
Because Goldman was for the work and Frick was against it.
I hope this helped.
I would say that Christopher Columbus was influenced by the travels of Marco Polo.
He was greatly inspired by his travels and wanted to become as famous as Polo was as an explorer, and eventually, he did follow in his footsteps. Polo's travels changed the European perception of the Asian world, and as you know, Columbus also wanted to go to Asia, but he ended up in America.
The current population of Brazil is 210,904,703.
The Allies invaded the Mediterranean because they wanted to remove Italy from axis powers. Axis powers are nations that fought in the WW2 so they basically didn't want Italy to fight in the war.