This term "war of all against all", I heard it somewhere before. Previously, I was with the impression that humans are inherently good but the more I grow older, the less sure I am of that. Putting good and bad on a spectrum, I think we constantly fluctuate across this spectrum based on a myriad of factors, some external, some internal. But one thing is for sure, we're messy and complex creatures
Yes the answer is not that easy and it does not apply in any situation.