Imagine Earth without humans or human made structures and products.  Plants and animals would blanket the Earth.  There would be no plane crashes, no mass shootings, no bombs, no pollution, no deforestation, and no wars.

Of course animals would kill each other but it would be mostly for food and on a much lesser scale than happens through human strife.

We are the wild card.  Once we entered the scene the rules of the game changed.  The balance has been disturbed and the biosphere is roiled with chaos.

The answer is simple.  We need to uncover the rules of nature and begin to play by them.  One of the best ways to do this is to learn from nature.  There are some great people who are promoting this idea and you can find out more at the following websites:

Biomimicry 3.8

AskNature.org