I don't support Lamarckism, I'm not sure how you reached this conclusion. They "target" by killing them; why not just kill a plant? How do you kill any animal in a non-violent way? All I was suggesting is that psychopaths(along with sociopaths) might be here to thin the heard, do you have any better ideas?
It's a "frequency-dependent" strategy. And (as I'm sure you know) it's not about "fixing" humanity, it's about a genetic defect in frontal lobe development that back somewhere in our evolutionary history allowed somebody to survive, so it happen to be selected in. That doesn't mean it's "good" or serving a purpose. Evolution is not teleological.
This. If you're looking at evolution, any line of reasoning that says "they're here to..." is missing the point, it should be "they're here because". Evolutionary processes take place for a reason, but not for a purpose. This was
exactly the difference between what Lamarck got wrong and what Darwin got right.
Anyway - as mentioned in the videos,
a majority of psychopaths do not kill people, nor are a majority of people who kill others psychopaths. We get that association because serial killers, the most chilling example, are overwhelmingly psychopaths. But serial killers are not a major cause of death, they're not "thinning the herd". Natural selection still happens, by the way, only there's less pressure. Health, physical attractiveness, social status, certain personality traits etc. massively affect people's reproductive success.
In fact, I'd argue that serials are essentially dysfunctional psychopaths - if psychopathy as a genetic trait has managed to take hold in the population, it's because it brings success. Serial killers are evolutionary failures - they don't function in society and they are eventually apprehended and incarcerated for most/all of their lives or outright executed. The survival tool of the psychopath is concealing his/her nature, and those who are inclined to constantly jeopardize their masquerade are engaging in self-destructive rather than self-preserving behavior.
Psychopaths are mimics. Serial killers are what happens when they mimic the wrong behavior patterns;
they're the ones being culled from Satan's miniature gene pool.