#philosophy #mind #rationality #psychology System 1 -> monkey brain, animal instinct, rational for survival among mammoth, not in human society. System 2 -> rational in human society >Aristote says that Plato was right in dividing the soul into two parts, one rational, the other irrational. The irrational part itself he divides into the vegetative (which is found even in plants) and the appetitive (which is found in all animals) The appetitive part may be in some degree rational, when the goods that it seeks are such as reason approves of. This is essential to the account of virtue, for reason alone, in Aristotle, is purely contemplative, and does not, without the help of appetite, lead to any practical activity ~ [[Bertrand Russell]]