Jonas Salk<span> </span><span>was an American </span>medical researcher<span> and </span>virologist<span>. He discovered and developed one of the first successful </span>polio vaccines in the 1950's.
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Postwar recovery that imposed harsh standards on the Southern states and supported newly freed slaves (freedmen) in their pursuit of political, economic, and social opportunities.
•Both Japan and Germany were dissatisfied with their positions in the international power structure. Both expanded their territories through force, causing tensions with other powers.
•However, Japanese leaders felt that they were not being treated as an equal power on the world stage because of racism, while Germans felt that they were being treated unfairly because of their defeat in World War I.
<span>•Japan's initial conquests were driven primarily by a desire to acquire raw materials and other resources, whereas Germany's were driven primarily by strategic rivalries with neighboring powers.</span>
Modern weapons would be considered the aspect of the war that causes the largest amount of casualties. The world feared that a Cold War would eventually trig ger another world war wherein the progressive production of nuclear bombs between the superpowers of the United States and Soviet union would lead to huge casualties across the globe.
State is run by a political party, and a commonwealth is an independent community run by they people
