Also, you may have reserved the cause-and-result relationship.
Western countries came up with democracy. also, if you dig into history, the idea of democracy already seeded since ancient Greek.
Anyway, Western countries had democracy, and the culture for that. They went through a series of revolution and war both in Europe and N.America until the system was established. One thing "cool" about democracy system is that it has the self-correct mechanism and it is still evolving right now. Anyway, because of many factors, western countries got rich and I believe part of it is because of democracy system that brings equal (or relatively equal) opportunities to people and thus respect varies rights of different people, thus the counties get wealthier and wealthier.
I dunno about them, I was in LYK so long. and I used to fight with people against democracy system.
but now I learn that 1) This is their choice. 2) no matter what I say, Peter is still Peter. fy is still fy, u r still u. what I said is totally not important, it is your personal experience that will affect you. 3) If I want to change someone mind, instead of writing 10000 words post to convince him. There are other ways to change the crowd.