The invisible hand is a term used by Adam Smith to describe the unintended social benefits of individual actions.
The text suggests representative democracy is justified by the D) The people cannot choose among competing leadership groups.
The Cold War, The Death Count (70 million), Also it shaped our world to develop Nukes!
Nobody knows for sure how April Fools Day started, but some big possibilities are the adaption of a new calendar in the year of 1582, some say that it even traces back to 1392 where in a play/story called 'The Nun's Priest's Tale' where a fox tricks a rooster. Some say it was a celebration of Spring coming, and in the past many of the spring celebrations where held in the beginning of April- These are the main ones.