Jonas Salk was an important American medical researcher and virologist, who is mostly known for developing the first successful polio vaccine in 1955.
-Gvcci
Answer:
The USA did not want to involve itself in any disputes that could lead to war. -The USA had had economic problems, for example the depression. -The USA did not trust Europe, especially after WW1. -The Atlantic ocean and the Pacific ocean surrounded the USA, making communication and trade inconvenient.
Is this a multiple choice questions?
Answer: The society's program focused on purchasing and freeing slaves, paying their passage (and that of free blacks) to the west coast of Africa, and assisting them after their arrival there.
Explanation:
In 1821, after a failed colonizing attempt the previous year and protracted negotiations with local chiefs, the society acquired the Cape Mesurado area, subsequently the site of Monrovia, Liberia. Some saw colonization as a humanitarian effort and a means of ending slavery, but many antislavery advocates came to oppose the society, believing that its true intent was to drain off the best of the free black population and preserve the institution of slavery.
