Richard Hanania's newsletter at his substack carries his article "Why Is Everything Liberal?" I found the link over at Quillette where I was reading the review of When Men Behave Badly (also quite good.) I believe he is somewhat liberal himself, though I may be reading the tea leaves wrong. He brings out interesting data about the greater energy that liberals bring to their causes, while conservatives tend to want to do other things with their lives. I have noted something similar here before, and related it to raising children, and possibly to having jobs other than at non-profits.
People who have children at home invest less time in protests and other culture causes. Their legacy is right in front of them and they volunteer for blood donation, scouts, little league, soup kitchens, community clean-ups, unwed mothers, and schools, even after their own children are grown. Hugely more, nearly 80%. Liberals see their legacies in terms of changing the culture.
Conservatives, especially religious ones, give their money to actual charities rather than culture-influencing causes. (See Arthur C Brooks, Who Really cares?)
I confess that while I see that as an understandable imbalance and see why it works, I also see the difference in where one's time is going as an enormous contrast of adulthood and morality.