[aroundtown]

Without opportunity there is no cart, nor horse, nor road to travel on.

Einstein was fortunate to be born into a family that was educated and well off enough to afford him to study. (Same with Oppenheimer and I'd reason most celebrated intellects) Had Einstein been born in the son of former slaves in the US South, he never would have been allowed to study math or physics, he likely wouldn't have been able to escape his situation as a farmer, and some other scientist would have had to figure out relativity. All of that is opportunity.