In the past, humans hesitated when they took lives, even...

In the past, humans hesitated when they took lives, even non-human lives. But society had changed, and they no longer felt that way. As humans grew stronger, I think that we became quite arrogant, losing the sorrow of 'we have no other choice.' I think that in the essence of human civilization, we have the desire to become rich without limit, by taking the lives of other creatures.