So then you are aware that what passes for “left wing” in US politics is considered moderate in the rest of the developed world, i.e. Western Europe, Scandinavia, Canada.
Yet virtually all these countries have far better outcomes than us on most social issues, including violent crime and rehabilitation.
On the specific issue of policing, the left wing of American politics, takes an extremely strong stance on the minimalization of the role of police. Yes, this is in spite of generally being more economically right than most European countries left wing parties.
I hope against hope that you aren't acting in bad faith, because I'd hate to see discussion on HN further degrade into oversimplified sound bites.
Yet virtually all these countries have far better outcomes than us on most social issues, including violent crime and rehabilitation.
So perhaps the issue isn’t left wing policies?