Nope, and that’s not what I said. The claim was that capitalism is the only system that has ever worked at a nationwide scale. The fact you brought up feudalism as an alternative shows it clearly wasn’t the only system that ever worked. And just like the divine right of kings was eventually found distasteful and overthrown throughout most of the world, so too can people come to find the capitalist system distasteful and replace it. It’s not a law of nature that people must operate under capitalism.