It may be a minority, but it's not like everyone in America would vote the same as everyone in Africa.

Of course not, Africa is not a developed continent. It's the Maslow pyramid:
https://en.wikipedia.org/wiki/Maslow%27s_hierarchy_of_needs

You cant engage them in debates about philosophy until there are people starving on the streets. Those things have to be solved first. But eventually they will evolve.

The rural areas don't agree with the urban areas on much of anything, but since the urban areas are more densely populated they'd run the show if it was direct democracy.

That is meaningless. We have internet and cryptographically provable identity. Anyone could basically vote online. You dont need ballot stations.

So you'd have 1.7 billion people voting for things that aligned with Chinese culture, and 7 billion people voting for things divided up among another 100 cultures or so.

Yes that is called decentralization. But also putting all Chinese people under the same category is a little bit racist. I am sure there are marxists, capitalists, christians, buddhists, and various other sub-groups there. I doubt they would have a 90% consensus on anything. Don't mistake the government for the people.

No, I don't think that at all. In fact there's no basis on any front for that. Even if you were right that a purely free market would increase our wealth, which I don't buy at all, it would actually reduce the birth rate. Wealthy people have fewer children, that's been shown again and again throughout history. Poor people have more children.

Not in that sense. Middle class and poor people would have more children, instead of 1 they could have 3. Now there are still people who have 3-5 kids, but they do it on welfare. And those that want 3 kids but only have 1 because they have to pay the taxes for the other guys, that is bad. So the lazy are incentivized to have more kids , but the hard working must stick to 1.

Besides having 1 kid if you are rich, although you could afford more, is simply quality vs quantity. And the only reason the government incentivizes people to have kids, is to maintain the pension system,that requires more new investors (social security payers) to join in, like a ponzi scheme.

I don't even know what you're trying to say with this...

In bitcoin you can have direct democracy amongst nodes, without them implementing any silly socialist policies like hardforking money out of rich addresses into poor ones. The distributed consensus mechanism, in this sense is not socialism. Socialism is always centralized, direct democracy is not.