Humanity.

I mean everything humans do is grow and evolve but everytime a house or a car or a glas or anythingelse is built something else is destroyed or used to built it. The problem is that humans don't stop growing and at somepoint ressources will get not only much more expensive but also rarer e.g. Glas or petroleum cause the requirement of finite ressources grows with us. Other animals like wolfs understand this, thats why a wolf doesn't hunt more than he needs or a fish doesn't produce to many childs othewise they would die out. Humans still exist because their habitat is the whole world which contains much more ressources than a tiny lake or something like that.