Necessitarianism

Necessitarianism is a philosophy that says that everything that happens is inevitable and could not have been different. It says that every choice people make is predetermined and that nothing could've been done differently. To explain it in a way that a 5 year old would understand - it means that everything that happens is like a game. The moves everyone makes are already written down, so there is no point in making different decisions because the result will always be the same!