You're right, you have to be constantly aware that you have the possibility. But it's really very stress-reducing.

I try to live in this way but I often fail and get carried away by "problems" :D

I agree with you that we wouldn't survive as a species if it wasn't our cooperation. And that we don't necessarily aim to get into conflicts in the first place. I find myself lately to have a very low opinion for our humankind :/ Maybe it's about time I put some conscious efforts to reframe it and look more optimistically at our future :)