Talking specifically about humans, what traits have survived despite being frowned upon? I'm convinced my ancestors found every excuse to get out of battle. They had the sniffles and were convinced it was plague or something. They survived. They just didn't fight for it.
Promiscuity seems like an obvious one. That seems like an enduring trait for any species.
Promiscuity seems like an obvious one. That seems like an enduring trait for any species.