The fact that there was a close grouping among physicists at the time works in Einstein's favor. Poincare could have easily realized E=mc^2, he was right there

The fact that there was a close grouping among physicists at the time works in Einstein's favor. Poincare could have easily realized E=mc^2, he was right there, but he didn't see it. Looking at the same questions and reading same papers as his peers Einstein simply went further.