Slave ships were large cargo ships specially converted for the purpose of transporting slaves. ... As many as 20 million Africans were transported by ship. The transportation of slaves from Africa to America was known as the Middle Passage.
One cause of the unparalleled material abundance of the United States in the 1950s is the population where in the population likely increase for about thirty million-- contributing to the unparalleled material abundance in the United States during the 1950s.
When water changes from liquid to gas at its boiling temperature the process is called vaporization. When this phase change occurs at a temperature below the boiling point it is called evaporation.
Answer: Gompers helped found the Federation of Organized Trades and Labor Unions in 1881 as a coalition of like-minded unions. In 1886 it was reorganized into the American Federation of Labor, with Gompers as its president. With the exception of one year, 1895, he would remain president of the organization until his death.