Physicists were thinking far ahead of their time in a very intelligent way．They saw what was going to happen before it actually did．They thought about modern computing in the 1950s，they imagined a lot of the technological progress that we would see only decades later in the real world．They were asking very theoretical questions because these ideas were still so far removed from practice．And they asked very moral questions as well，because the things they conceptualized could be used for great good or for great evil．It could go either way，so moral judgments had to be made．