The Unknown Future

The terms optimism or pessimism have always been about the unknowable. Originally, optimism was the doctrine that the world, past, present, in future, is as good as it could possibly be. The term was first used to describe an argument of leibnitz,. That god, being perfect, would have created nothing less than the best of all possible worlds. He proposed all apparent evils in the world are outweighed by good consequences that are too remote to be known.