stock market returns

[http://dummy.us.eu.org/robert (Robert)]

Yeah, pretty interesting stat about 8% returns of the stock market.  Did a
lookup and this comment,
https://www.reddit.com/r/AskEconomics/comments/1hnimjb/comment/m45wncn/ ,
seems to claim that returns over all human history are about 4%-5%.  This
entire thread has an interesting discussion of why stocks have higher
returns than the GDP, and it seems to boil down to class: people in the
"owner" class seem to gain more overall than those that do not own things.
Great thought experiment, in any case.