There were hundreds of thousands of Einstein's brain capacity people before him but had no opportunity to discover the Relativity Theory. And hundreds of thousands born after him but had lost chance to discover the Relativity Theory because Einstein already had found it.,(reply>), @Jack Tseng Perhaps not exactly the same way  but in general more or less when it applies to the predecessors and successors.,(reply>), vallab so you think. You may say that in mathematics and general physics. Not so quick in relativity.