Life is all about to food and sex. If people don't need to eat food and having sex, then no one won't do anything. Even there wasn't any world war.
Without the demand for food and sex , the earth will be heaven.
Forgot that you are hungry and you need food. Forgot that your gender need having sex. Then think if you do not need food or sex, then what other you need ? What is the meaning of life ? Why you live for ?
God give us these two things to examine us. If you fail, we won't get God. And if we pass , will get him.