In 1787, Benjamin Franklin became president of a Pennsylvania society that was America's first organized effort to end what?

Which composer supervised a 1907 phonograph recording of his own opera "Pagliacci"? Which executive told a U.S. Senate hearing in 1998, "At Microsoft we are spending $2.6 billion in R&D this year"? Which composer was buried in New York in 1945 and reburied in his beloved Hungary in 1988? Which physicist was traveling to Japan, stopping in Shanghai in November 1922, when he learned he had won the 1921 Nobe… Which presidential candidate said he regretted "the events that led to my withdrawal from the race," adding, "I should… Which U.S. president was the first to have practiced law? Which World War II Purple Heart recipient was a major party's presidential nominee in 1996? Heart attack survivor Kerry Packer paid for Australian ambulances to carry portable devices nicknamed "Packer Whackers.…