Why did opera first succeed as a public art form in Venice between 1637 and 1650 when all the elements of the new form were fully evident? The answer is to be found in the conjunction between Venetian carnival festivity and the intellectual politics of Venetian republicanism during the two generations after the lifting of the papal interdict against Venice in 1607. During this extraordinary period of relatively free speech, which was unmatched elsewhere at the time, Venice was the one place in Italy open to criticisms of Counter Reformation papal politics. Libertine and skeptical thought flourished in the Venetian academies, the members of which wrote the librettos and financed the theaters for many of the early Venetian operas.