> When my cat cuddles up to me on the bed, this natural 'life is a fight' law falls to pieces. Beings are capable of generosity without a gaining idea, and most of us have encountered this as part of our lives.

devil's advocate: your cat does this so that you continue to feed/protect/pay attention to it.

you may not like that negative point of view, but it seems like a reasonable strategy for survival in a really tough world pre-modern era (still is tough for many).