How did the Yalta conference cause a postwar power shift between the United States, Britain, and the Soviet Union?

Roosevelt of the US. ... The US also terminated their Lend-Lease aid to the Soviet Union before the war ended. US tension started when Russia promised free elections in Eastern Europe and they didn't keep to their word and had a communist government instead.

Ifound this on google “simply, the working conditions were terrible during the industrial revolution. as factories were being built, businesses were in need of workers. with a long line of people willing to work, employers could set wages as low as they wanted because people were willing to do work as long as they got paid.” i hope this you for what your looking for.

Because the discoveries were some of the oldest human remains.