I remember a while back being taught in my APUSH class that the crash was not the only, nor the greatest, contributor to the Great Depression but was more a result of the economics of post-WWI America. Am I remembering incorrectly?
A cause. Because markets don't crash after people (wake up one morning and suddenly they) get depressed. The market crashes first and then the people get depressed. An analogy is someone getting sick: you can't get sick without a virus or bacteria, but if you do, you're "sick".