Human evolution has nothing to do with technological spread. Do you really think it's taken this long for the technology of clean water to reach the entire planet? The only reason the companies you mentioned are doing it now is for publicity.
Anyway, I give up. I can see you're devoted to this religion you've formed.
These are all facts...you simply refuse to see them...you couldn't have looked at the UN numbers, you didn't look at the technologies involved, you didn't look at mathematical models of exponential growth. So again...while the end result is uncertain, it really appears to be headed in that direction. So if you refuse to believe anything will change in the next 30-50 years, maybe at least I can enlighten you about the past...