The Absurdity of Original Sin

[T]his doctrine, called original sin, is, in the first place, totally impossible, and in the second place, that it is as immoral and unjust, as the Creator is righteous and benevolent. The virtues and the vices of intelligent beings are not of a transferable but of a personal nature. In a moral point of view, the amiable or useful qualities of one man cannot become those of another, neither can the vices of one be justifiably punished in the person of another. Every man is accountable for himself; and when he can take no cognizance of the intentions or actions of any other man, how can he be justly responsible for their injurious effects, or applauded for any benefits resulting from them? If Adam or any other man, who lived several thousand years ago, was guilty of an immoral conduct, what has that to do with the moral condition of the present generation? Is a man to become criminal before he has existed? or, is he to be criminated afterwards, by the immoral conduct of those who lived long before him? Has not every man errors enough of his own to answer for, without being implicated in the injurious consequences resulting from the bad conduct of his neighbour?

--Elihu Palmer (1764-1806), Principles of Nature; or, A Development of 
the Moral Causes of Happiness and Misery Among the Human Species