The primary purpose of the Hawley-Smoot Tariff of 1930 was to raise tariffs on imports to the United States in an effort to protect domestic jobs. It was widely seen as a failure, however.
I don't know whether there were options, but one technology for which the Bantu are quite well-known is the iron smelting: numerous archaeological sites (for example in Eastern Nigeria) with remains of iron smelting have been found in the area inhabited by the Bantus.
It was an anti Catholic secret society established in 1887.
