Capitalism is inherently anti-democratic
No its not. At its core, capitalism is about allowing people to directly trade and find the most efficient solutions. This has led to the success of the west.
It creates an owner class and a worker class
Does it? I've been a worker. I've been a company owner (well, technically still am). So?! If you want to own something, you buy it.
As for “successful,” I suppose that depends on what metrics you use.
How about the metric of the largest super power in the world? How about the most advanced power in the world? How about the richest country in the world? Trust me, I'm not trying to woo the USA, it is VERY flawed with a shit tonne of problems, but it is BY FAR the most successful country in the world coming up with "yeah what metric" is bullshit. Ask a poor homeless person in the USA if they would perfer to extrange their lives with somebody in say, Niger, and I think I can be pretty sure they will say "HELLS NO" because as shitty as their lives are, its still a mile better than the alternative. The USA does not have famines.
I’d bet there have been other societies that were on a whole happier than capitalist industrial societies.
Yeah this is just plain naive. This is looking at the problems that our current societies have, and without knowing anything about the alternatives, saying "well the alternatives must be SO MUCH BETTER!" Yes, our capitalist system needs MUCH more checks and balances, we need to tax the shit out of the rich, we need less focus on material things and money and more focus on just being happy, we need universal and free healthcare, we need free education.. So many problems we need to resolve...
But its NOTHING compared to how life was only a hundred years ago where people still got 12 kids because they knew that on average, 4 of them would not even reach adulthood because of diseases, famines, war and whatnot.
Say what you want about the US, and it has done some fucked up shit, but its been a pretty stabilizing force in the world. Without the US, the communist USSR would have overrun Europe and we'd all be enjoying the funs of famines, state terror (read about the chekists!) and just general misery.
There are no other countries that match the successes of capitalism, period...
Now, you want to talk on really how to improve societies?
Try north European countries. Socialist countries that use their capitalist systems to fund their socialist ways. THAT, I believe, is the solution. Control wealth with taxes, but let people free to do what they want. Educate people, have a shared political power system (and not the winner-takes-all shit like everywhere in the Americas) so that you have political stability, use the power from limited and capped capitalism to fund things like free healthcare, free education, a strong army for defense (unfortunately still required).. That will make hte world a better place.