(2) But even in its general result custom may be harmful. Morals have developed blindly, as we have seen, through all sorts of irrational influences, swayed this way by class interest, by rulers or priests, veered that way by superstition, passion, and stupidity. Morality has not understood itself; and the natural forces which have developed it into its enormous usefulness have not always weeded out the baneful elements. The persecution of heretics was sheer mistake, but it was acceded to by practically the entire Church in the Middle Ages, and practiced with utter conscientiousness. The hostility of the Puritans to music and art was pure folly, though it seemed to them their grim duty. (3) New situations are continually arising, new sins appearing. Conventional morality, while sometimes over-severe against old and well-recognized sins, lags far behind in its branding of the newer forms. The evils arising from the modern congestion of population, the unscrupulousness of modern business, the selfishness of politicians, the servility of newspapers to the "interests" and to advertisers, for example, find too little reprobation in our established moral codes. "Business is business" has been said by respectable church-members. A successful American boss, when asked if he was not in politics for his pocketbook, said, "Of course! Aren't you?" with no sense of shame. Probably he was very "moral" along the old lines, an excellent father, a kind husband, an agreeable neighbor; but his conventional code, shared by most of his contemporaries, did not include the reprobation of the practice of politics for private gain. In the upper classes are many people who are "good" by the old standards, but who are unhelpful and trivial-minded, mere parasites devoted to sport or society, with never a qualm of conscience for their selfishness. The old standards need the constant infusion of new blood; our consciences need to be adjusted to our new relations and deeper insight. [Footnote: Cf. Rosa, Sin and Society, p. 14: "One might suppose that an exasperated public would sternly castigate these modern sins. But the fact is, the very qualities that lull the conscience of the sinner blind the eyes of the onlookers. People are sentimental; and bastinado wrongdoing not according to its harmfulness, but according to the infamy that has come to attach to it. Undiscerning, they chastise with scorpions the old authentic sins, but spare the new. They do not see that blackmail is piracy, that embezzlement is theft, that speculation is gambling that deleterious adulteration is murder. The cloven hoof hides in patent leather; and today, as in Hosea's time, the people 'are destroyed for lack of knowledge.'"]