It's very sad that the Nazis made eugenics into a taboo for the next century. The conclusion of WW2 should've been the opposite - narcissism and lack of empathy (also known as psychopathy) endanger the entire world and need to be minimized in the gene pool. It is, of course, too late now.
Lack of empathy is not just inborn trait, it is ideological expectation. Nazi praised lack of empathy (especially in men) and ended up raising people to be like that
And currently, quite a lot of what conservatives see as traditional masculinity is that - you look at what they teach young men and lack of empathy is seen as asset. Compassion is seen as weakness.
But it has zero to do with genetics, it is values.
