Styley, I think it's already out of control and the process of human destruction is running away. Nature is already taking its course.
Humans seem to have this idea that they can 'freeze' the planet so that it remains just as it is now. We spend huge amounts trying to stop extinctions, coastal erosion, melting of glaciers, rising sea levels, global warming etc.The fact is, these changes are natural and they have always occurred for purely natural reasons. Whether it is asteroid impact, volcanism, changing orbit around the sun, disease, evolution, all change is natural. That also includes human exploitation of resources and loss of habitat.
Nature always recovers - even at the end of the Permian when 96% of the world's species died out. New species evolve to fill available niches and that is what is happening now. Humans are destroying - not the planet - but themselves and their civilisation. All species eventually become extinct and we are going that way now. We will soon outgrow our resources and destroy our food supplies by expanding over them. It happened to civilisations such as the Maya and Sumerians and we see it everywhere today.
I think the extinction of humans will come from unlimited population expansion. That is the root cause of the world's problems such as global warming, lack of water, overfishing, loss of rainforest, extinction of species. One way of tackling those problems is to address population increase but no one will touch that Instead, we waffle on about sorting out plastic from glass and switching off our standbys.
Looking at the larger picture, humans are as fated to extinction as all those endangered species today. But the planet will recover and new species will evolve to fill the niches. People tend to look just as far as their grandchildren but the planet will be healthy again in several million years. The failed human species will be long forgotten.