Game theory is used in politics, business, science, negociation, war etc. Some of the principle and elements of game theory are: 1)There are two opposite players 2)or two players(couple) but different targets 3)there must a loser and winner 4) the outcome maybe more than one, 5) it's used to study mind 6) it can be used to control mind 7) it's used to manipulate game 8.)it can be collective strategy or seperate strategy 9) a player who accepts defeat may chiken out 10) in a case where outcome is more than one both player may get points but the players who has more outcomes is a winner. You cant defeat me in any game but i dont like playing game