The decisions we make collectively as a species have an impact upon the fate of Earth. For example, we make decisions about how many carbon atoms we want to take out of flammable material to put back into the atmosphere, how many fish we want to eat, and how to go about with things like genetic testing and gene therapy continuously.
However, you are a product of the Earth. You grew out of the earth rather than coming into it. You are connected to the Earth in many more ways than you may realize in the everyday.
If we as a species push too much carbon into the atmosphere or decide to eat fish to the point of extinction, or modify genetics to the point of out-of-control craziness and destruction, Earth will certainly find a way to re-balance itself (perhaps at the expense of the human race). Just as mammals came about after the dinosaurs could no longer navigate the world, something will certainly come after humans.
Unless we take deliberate and conscious steps towards cohabiting with mother Earth in a way that we both survive, Earth will stop sharing its goodness with us humans (that is, there won’t be any of us humans!).
If Earth faces a battle with the humans, Earth will eventually win and whatever survives gets a go at things (that is, until the sun burns out in billions of years).
But even so, can it really be possible that this is the only place in the universe where life exists? Not at all. The conditions for life have always been folded into the universe, waiting to be expressed (humans are just one single expression of life).
You can bet other species are facing the same struggle.