Renaissance thinkers encouraged individuals to question how things work, and scientists began to test these ideas with experiments during the Scientific Revolution.
The job title that an enslaved person would most likely have is a field worker.
To help other people realize something that might not be common sense to them.
Stalin wanted the US and Great Britain to open a second front in France because it would divide the German military. During the time of this statement, Germany's only real military threat came from the Soviet Union. With this in mind, Hitler had the ability to put a huge number of troops on the Soviet Union/German border.
However, if the US and Great Britain planned an invasion through France, that means Hitler would have to move hundreds of thousands, maybe even millions, of troops to France. France, in relation to the Soviet Union, was over 1,000 miles away.
Forcing Germany to fight this two front war would decrease their chance of success.