John F Kennedy aftermath

John F Kennedy's policies set off ultra-right worries. He was removed. His later competitors in policy included Barry Goldwater, Milton Friedman and Ronald Reagan. None of them were assassinated. Their policies were persistently tried but did not remedy the US recession.
"Much of the social history of the Western world, over the past three decades, has been a history of replacing what worked with what sounded good" - Thomas Sowell