What else causes them?

How about undercutting competition? Or simply buying them out?

No it wasn't. It was caused by the Fed restricting the gold supply leading to bank failures, and the Smoot Hawley tariff restricting international trade. The economy actually started recovering fairly well after the 1929 crash until its ability to recover was restricted by those two things.

Nope, it was caused by overleveraging and speculation. Your view is a very very fringe one only supported by Austrians.

Wrong. Productivity is higher than ever. Productivity doesn't just come from labor, but capital too.

Specifically labor productivity is higher than ever as well.

Further worker productivity isn't uniformly higher, nor are wages the only compensation.

What other compensation is there that workers aren't already getting? Particularly low-skill workers?

A shareholder is an owner. That's basically it. One owner=one shareholder.

Nobody calls a shareholder a businessowner, that's just a fact. You're just trying to redefine words.

You've done but repeat left wing boilerplate at the level of a high school understanding of economics and history, all without backing any of it up, and

Similarly, your views are basically what I'd find if I read an article at random on mises.org. You're assuming your narrow, super-fringe views are mainstream and accepted by everyone.

while I've answered all of your questions, you have avoided a number of mine.

Like what? You still haven't proved why capital deserves profit and labor doesn't, beyond some flimsy claims about risk.

We can stop here if you like, but don't think you have the intellectual high ground when you don't meet me halfway on the conversation and instead of refining your position in light of criticism repeat it and then cry ideologue to anyone who continues to disagree and provides reasons for doing so.

Bit of an ironic complaint.