Earlier quoted context omitted.
It is literally impossible for everyone to obtain wealth. Wealth isn't a number or physical circumstances. Wealth is having economic power over the people around you. Success is a little more nebulous, but when thought of as a relative of wealth it's similarly contextual. The danger isn't everyone but you getting wealthy. The danger is that wealth tends towards concentration. And it tends to concentrate around people…
No. The world has absolutely gotten wealthier over the last few centuries. Wealth is obviously not zero sum. Humanity is far wealthier today than before the industrial revolution, and the trend is still towards increasing wealth.
The latter is absolutely zero sum, because of everybody has a billion, a billion isn't that much any more. E.g. human trafficking exists because some people are rich and others are poor, and the fact that even those poor people might have access to things an emperor 1000 years ago would have dreamed of doesn't change that, because the people who treat them like slaves have even more. It's all about the relative difference between people who are alive today, the absolute increase compared to people who lived N years ago is a red herring.