I think it's probably the case that, in the human evolutionary lineage, even before there were homo sapiens, feelings like compassion and love and sympathy had earned their way into the gene pool, and biologists have a pretty clear idea of how this first happened.
Cred ca, probabil in linia evolutiei umane, inainte chiar de a exista Homo sapiens, sentimente cum ar fi compasiunea, iubirea si simpatia si-au facut oarecum loc in fondul genetic, si biologii au o idee destul de clara cum s-a intamplat asta prima data.