Our research- and rankings-driven universities oblige arts academics to teach their research in order to justify their existence. This makes it very hard to establish coherent, overarching disciplinary perspectives, as opposed to an assemblage of research programs with teaching spinoffs.
“Western civilisation” shouldn’t be a contentious concept. If “civilisation” refers to the communal arrangements of relatively large or dense populations, broadly affiliated by enduring practices, rules and beliefs, and embellished and facilitated by characteristic arts, techniques and individuals, then that term seems uncontroversial. No one objects to the study of Chinese, Persian, Mesopotamian, Arab, Indian, Aztec, Inca or classical Greek civilisations.
As for “Western”, we are happy to speak of Western Australia, or the Western Isles of Scotland. Something being west of something else doesn’t seem intrinsically objectionable. We all have to be west of somewhere. Europe is west of Asia and the Middle East (although north of Africa). It has a civilisation with distinctive features and inheritances (although some of these derive from its closest neighbours). The Americas are west of Europe and in turn inherited many of these features, and “Euro-American civilisation” is a bit of a mouthful, as well as incomplete seen from New Zealand and points west.
Furthermore, many of these distinctive features are recognised worldwide as uncontroversially “Western”, as opposed to Chinese, Aztec and so on. Homer and Dante, Shakespeare and Goethe, Jane Austen and Joan of Arc, Plato and NATO, Beethoven and Bartok, Leonardo and Picasso, the Parthenon and the Pantheon, Napoleon and Julius Caesar, Botticelli’s Venus and the Mona Lisa, the Roman empire and Christianity, the Enlightenment and its revolutionary American, French, industrial and scientific heirs, democracy and human rights. Most educated Chinese people, for example, would recognise much of this list as “Western”, are interested in its features, and where feasible would like to photograph themselves standing in front of one of them.
“Civilisation” is an unremarkable concept, then, and so is “Western”. But there’s a nuclear reaction when the two are put together. The idea of “Western civilisation” is contentious. Criticism of it is constant, and is of two kinds. The first comes mainly from scholars and intellectuals, who offer some version of the argument that the concept is empty or meaningless. The second criticism (censure, really) is of the thing, “The West” and all its works. In its domestic or endogenous form this also comes mainly from intellectuals, less scholarly ones on the whole, including especially students. But there is also an exogenous form, from people all over the world with radical non-Western or anti-Western attitudes and agendas, either covert or overt. Taking the two broader types of criticism together: either Western civilisation is nothing, or it is wicked. Either it doesn’t exist, or it shouldn’t.
The denial of its existence is an example of a common intellectual propensity to scrutinise some familiar object more and more closely until the object itself disappears, as under a microscope. Max Planck and Erwin Schrödinger led quantum physics into seeing the visible world as fundamentally made of invisible energy. The harder scholars look at “Western civilisation”, the more fine-grained their analysis becomes, the less aware they are of the larger entity. Instead, they see its important sources and analogues in the Middle East or Africa (if Egypt is Africa), or the Arab scholars of the so-called “early middle ages” (a golden age for them) who were such vital transmitters of Greek thought to Europe. They see “Europe” and “the West” as concepts with identifiable provenance, so that almost by definition they once “didn’t exist”. They see the concept as embracing so many dissimilar or conflicting elements that it has no real meaning any more. They have difficulties with calling its essential elements “Western”, properly speaking (Christianity arose in the Middle East and so many of its adherents are now African or Asian). Above all, they can’t see “Western civilisation” as having any single, essential defining feature.