In his old age he became a communist and during the cold war it was just too tough to be a communist in the US. He went to Ghana after it became the first African country. DuBios has worked for African independence all his life, and was invited to enjoy it by Kwame Nkrumah, his old friend, and Ghana's first president.
In agriculture you don't need to build factories to process and manufacture goods. The only benefit I would say is it became easier, but didn't change much.
