But all your numbers (except maybe top 5% one) are completely made up. Strong beliefs don't prevent one from being completely wrong. Neville Chamberlain has a strong belief that he had ensured peace; Einstein had a strong belief that quantum theory's "spooky action at a distance" was incorrect. Both were wrong. Fifty years is a long time, and anything could happen. The last fifty years had the fall of Communism, the EU, China going from an impoverished countryside to a superpower, video phones in our pocket, social media upending communication and mental health, renewable energy displacing coal, Trump, etc.