And since the natural state of humanity is poverty (after all we all started as hunter-gatherers), breaking out of it on your own is extraordinary. I wouldn't be surprised that the first communities to break out of poverty had 1 extraordinary individual that lifted their entire family/clan/tribe. Then through social osmosis more people in their vicinity were lifted, provided they cooperated/were open enough to the new thing that made their neighbors rich/were not discriminated for a million reasons/...).
Look at the Industrial Revolution. It basically spread geographically from the UK and is also spread socially to UK off-shoots, first.