His premise looks nothing like what I have posited. He came from a stupid position that reality was a zero sum game, that at some point there would be too many people and then you have to decide who is contributing enough. I come from the historically proven position that reality is NOT a zero sum game, that more people contributing fully can and do create and free up more resources and there is simply no such thing as too many people.
He started from incorrect and historically dis-proven assumptions and carried them to an incorrect logical conclusion. Interestingly his incorrect assumption bear a striking resemblance to the incorrect assumptions of Marx which lead him to communism. Zero sum basis is just plain bad thinking.
You just proved my point. He thought he got to decide based on "who is contributing enough," and you have said that you think you get to recognize rights based on your utilitarian judgment that, and I quote: "equal rights maximizes your society’s output, because you have more people in a position to contribute to the full extent of their ability."
Same premise: your opinion about what is best for you, and/or for "society."
Without God, and the in-born morality that all of us recognize in our conscience, in the equation, all that is left is your subjective, impetuous opinion. Or the opinion of Malthus. or Marx. Or whomever.
If it ain't God-centered, it will be self-centered. And, as all human history has shown, disastrous in the end.
“Of all the dispositions and habits which lead to political prosperity, Religion and Morality are indispensable supports. In vain would that man claim the tribute of Patriotism who should labor to subvert these great Pillars...Let us with caution indulge the supposition that morality can be maintained without religion. Reason and experience both forbid us to expect that national morality can prevail in exclusion of religious principle...Morality is a necessary spring of popular government...Who that is a sincere friend to it can look with indifference upon attempts to shake the foundation?
— George Washington, Farewell Address