Historical outline
Modernism as a tendency emerged in the mid-19th century, particularly in Paris, France, and was rooted in the idea that the "traditional" forms of art, literature, social organization and daily life had become outdated, and that it was therefore essential to sweep them aside. In this it drew on previous revolutionary movements, including liberalism and communism. Modernism encouraged the re-examination of every aspect of existence, from commerce to philosophy, with the goal of finding that which was "holding back" progress, and replacing it with new, and therefore better, ways of reaching the same end. In essence, the modernist movement argued that the new realities of the industrial and mechanized age were permanent and imminent, and that people should adapt their world view to accept that what was new was also good and beautiful.
Precursors to modernism
The first half of the 19th century for Europe was marked by a number of wars and revolutions, which reveal the rise of the ideas and doctrines now identified as Romanticism: Emphasis on individual subjective experience, the supremacy of "Nature" as a subject for art, revolutionary or radical extensions of expression, and individual liberty. By mid-century, however, a synthesis of these ideas with stable governing forms had emerged, partly in reaction to the failed Romantic Revolutions of 1848. It was exemplified by Otto von Bismarck's realpolitik and by "practical" philosophical ideas such as positivism. Called by various names — in Great Britain it is designated the "Victorian era" — this stabilizing synthesis was rooted in the idea that what was real dominated over what was subjective.
Central to this synthesis were common assumptions and institutional frames of reference, including the religious norms found in Christianity, scientific norms found in classical physics, and doctrines that asserted that the depiction of external reality from an objective standpoint was in fact possible. Cultural critics and historians label this set of doctrines Realism, though this term is not universal. In philosophy, the rationalist and positivist movements established a primacy of reason and system.
Against the current ran a series of ideas, some of them direct continuations of Romantic schools of thought. Notable were the agrarian and revivalist movements in plastic arts and poetry (e.g. the Pre-Raphaelite Brotherhood and the philosopher John Ruskin). Rationalism also drew responses from the anti-rationalists in philosophy. In particular, Hegel's dialectic view of civilization and history drew responses from Friedrich Nietzsche and Søren Kierkegaard, who were major influences on Existentialism. All of these separate reactions together began to be seen as offering a challenge to any comfortable ideas of certainty derived by civilization, history, or pure reason.
From the 1870s onward, the ideas that history and civilization were inherently progressive and that progress was always good came under increasing attack. Writers like Wagner and Ibsen had been reviled for their own critiques of contemporary civilization and for their warnings that accelerating "progress" would lead to the creation of individuals detached from social norms and isolated from their fellow men. The argument arose not merely that the values of the artist and those of society were different, but that society was antithetical to progress, and could not move forward in its present form. Philosophers called into question the previous optimism. The work of Schopenhauer was labelled "pessimistic" for its idea of the "negation of the will", an idea that would be both rejected and incorporated by later thinkers such as Nietzsche.
Two of the most disruptive thinkers of the period were, in biology, Charles Darwin and, in political science, Karl Marx. Darwin's theory of evolution by natural selection undermined religious certainty of the general public, and the sense of human uniqueness of the intelligentsia. The notion that human beings were driven by the same impulses as "lower animals" proved to be difficult to reconcile with the idea of an ennobling spirituality. Karl Marx seemed to present a political version of the same proposition: that problems with the economic order were not transient, the result of specific wrong doers or temporary conditions, but were fundamentally contradictions within the "capitalist" system. Both thinkers would spawn defenders and schools of thought that would become decisive in establishing modernism.
Separately, in the arts and letters, two ideas originating in France would have particular impact. The first was Impressionism, a school of painting that initially focused on work done, not in studios, but outdoors (en plein air). Impressionist paintings demonstrated that human beings do not see objects, but instead see light itself. The school gathered adherents despite internal divisions among its leading practitioners, and became increasingly influential. Initially rejected from the most important commercial show of the time — the government-sponsored Paris Salon — the art was shown at the Salon des Refusés, created by Emperor Napoleon III to display all of the paintings rejected by the Paris Salon. While most were in standard styles, but by inferior artists, the work of Manet attracted tremendous attention, and opened commercial doors to the movement.
The second school was Symbolism, marked by a belief that language is expressly symbolic in its nature, and that poetry and writing should follow whichever connection the sheer sound and texture of the words create. The poet Stéphane Mallarmé would be of particular importance to what would occur afterwards.
At the same time social, political, and economic forces were at work that would become the basis to argue for a radically different kind of art and thinking. Chief among these was steam-powered industrialization, which produced buildings that combined art and engineering in new industrial materials such as cast iron to produce railroad bridges and glass-and-iron train sheds, or the Eiffel Tower, which broke all previous limitations on how tall man-made objects could be, and at the same time offered a radically different environment in urban life.
The miseries of industrial urbanity, and the possibilities created by scientific examination of subjects brought changes that would shake a European civilization which had, until then, regarded itself as having a continuous and progressive line of development from the Renaissance. With the telegraph's harnessing of a new power, offering instantaneity at a distance, the experience of time itself was altered.
The breadth of the changes can be seen in how many disciplines are described, in their pre-20th century form, as being "classical", including physics, economics, and arts such as ballet.