I think he was apart of only 1 organization which was the “Southern Christian Leadership Conference”
The desert which covers much of Botswana is called the Kalahari Desert.
When young people migrate from a rural area which probably already is suffering from a low birthrate, this effectively eventually can create a "lack of life" in a certain place where after a decade or a few decades, a certain rural area can actually die out due to not enough young people being there anymore.
Answer: The USA was afraid that communism would spread to South Vietnam and then the rest of Asia. It decided to send money, supplies and military advisers to help the South Vietnamese Government.
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