strong leaders such as Oliver Cromwell, Frederick the Great and Napoleon. Romantic nationalism had a largely negative effect on the writing of history in the 19th century, as each nation tended to produce its own version of history, and the critical attitude, even cynicism, of earlier historians was often replaced by a tendency to create romantic stories with clearly distinguished heroes and villains. Nationalist ideology of the period placed great emphasis on racial coherence, and the antiquity of peoples, and tended to vastly overemphasize the continuity between past periods and the present, leading to national mysticism. Much historical effort in the 20th century was devoted to combating the romantic historical myths created in the 19th century. Theology To insulate theology from scientism or reductionism in science, 19th-century post-Enlightenment German theologians developed a modernist or so-called liberal conception of Christianity, led by Friedrich Schleiermacher and Albrecht Ritschl. They took the Romantic approach of rooting religion in the inner world of the human spirit, so that it is a person's feeling or sensibility about spiritual matters that comprises religion. Chess Romantic chess was the style of chess which emphasized quick, tactical maneuvers characterized by aesthetic beauty rather than long-term strategic planning, which was considered to be of secondary importance. The Romantic era in chess is generally considered to have begun around the 18th century (although a primarily tactical style of chess was predominant even earlier), and to have reached its peak with Joseph MacDonnell and Pierre LaBourdonnais, the two dominant chess players in the 1830s. The 1840s were dominated by Howard Staunton, and other leading players of the era included Adolf Anderssen, Daniel Harrwitz, Henry Bird, Louis Paulsen, and Paul Morphy. The "Immortal Game", played by Anderssen and Lionel Kieseritzky on 21 June 1851 in London—where Anderssen made bold sacrifices to secure victory, giving up both rooks and a bishop, then his queen, and then checkmating his opponent with his three remaining minor pieces—is considered a supreme example of Romantic chess. The end of the Romantic era in chess is considered to be the 1873 Vienna Tournament where Wilhelm Steinitz popularized positional play and the closed game. Romantic nationalism One of Romanticism's key ideas and most enduring legacies is the assertion of nationalism, which became a central theme of Romantic art and political philosophy. From the earliest parts of the movement, with their focus on development of national languages and folklore, and