It’s a great question. But a complicated one.
See, ALL theories of human nature are an amalgam of both good and evil. The issue is the ratio of good to evil.
And virtually ALL of what is good in Leftism is also found in Conservatism. I don’t have to go Leftist to care about the poor or the environment.
The Left promotes gun-barrel generosity. And I think that is immoral. And it’s really not something I can philosophically tolerate. It’s a deal-breaker for me. I think coercion should NOT be the first choice.
Now I understand that in this fallen world there are times when force is necessary–confining people in jail, for example. But it should only be done reluctantly, as the last and best possible option. Better to use persuasion and true concern.