Isaiah Berlin was deeply admired during his life, but his full contribution was perhaps underestimated because of his preference for the long essay form. The efforts of Henry Hardy to edit Berlin's work and reintroduce it to a broad, eager readership have gone far to remedy this. Now, Princeton is pleased to return to print, under one cover, Berlin's essays on Vico, Hamann, and Herder. These essays on three relatively uncelebrated thinkers are not marginal ruminations, but rather among Berlin's most important studies in the history of ideas. They are integral to his central project: the critical recovery of the ideas of the Counter-Enlightenment and the explanation of its appeal and consequences - both positive and (often) tragic. Giambattista Vico was the anachronistic and impoverished Neapolitan philosopher sometimes credited with founding the human sciences. He opposed Enlightenment methods as cold and fallacious. J. G. Hamann was a pious, cranky dilettante in a peripheral German city. But he was brilliant enough to gain the audience of Kant, Goethe, and Moses Mendelssohn. In Hamann's chaotic and long-ignored writings, Berlin finds the first strong attack on Enlightenment rationalism and a wholly original source of the coming swell of romanticism. Johann Gottfried Herder, the progenitor of populism and European nationalism, rejected universalism and rationalism but championed cultural pluralism. Individually, these fascinating intellectual biographies reveal Berlin's own great intelligence, learning, and generosity, as well as the passionate genius of his subjects. Together, they constitute an arresting interpretation of romanticism's precursors. In Hamann's railings and the more considered writings of Vico and Herder, Berlin finds critics of the Enlightenment worthy of our careful attention. But he identifies much that is misguided in their rejection of universal values, rationalism, and science. With his customary emphasis on the frightening power of ideas, Berlin traces much of the next centuries' irrationalism and suffering to the historicism and particularism they advocated. What Berlin has to say about these long-dead thinkers - in appreciation and dissent - is remarkably timely in a day when Enlightenment beliefs are being challenged not just by academics but by politicians and by powerful nationalist and fundamentalist movements. The study of J. G. Hamann was originally published under the title "The Magus of the North: J. G. Hamann and the Origins of Modern Irrationalism". The essays on Vico and Herder were originally published as "Vico and Herder: Two Studies in the History of Ideas". Both are out of print.