Metaphysics is the study of absolute presuppositions which underpin contemporary scientific inquiry. Invented by Aristotle, who erroneously conceived it as a science of being (‘ontology’ to Collingwood), the subject’s birth simultaneously gave rise to science: for to think scientifically is to answer a question; questions require presuppositions; and all such questions and presuppositions must somehow be grounded. (Propositions seek to answer ‘is it true’ or similar queries; facts, from Bacon onward, are things that answer questions.) All metaphysical questions are historical questions: what was the contemporary view?

Mistaking the certainties of one’s age for the certainties of all ages is a fundamental error. It is religion’s role to promote the development of absolute presuppositions. Thus Collingwood concludes the Christian church has been the guarantor of Western science. He shows how the doctrine of the trinity corresponds with modern science, which rests of absolute presupposition of nature as one, and therefore science as one in corresponding to law.

‘Antimetaphysics’ is an irrational, unscientific view of life, to which Collingwood ascribes various personas. Deductive metaphysics is a constellation of absolute presuppositions which are without conflict, like coherent mathematics; but metaphysics (i.e., history of ideas) is never without internal tensions. Logical positivism, which seeks to prove presuppositions (and all else) as fact, is the most prominent example of the pair of enemies of metaphysics; in actuality it treats fact in a medieval manner.

By targeting metaphysics, positivism continues the 18th-century attack on classical Greek thought. Separately, psychology, which purports to be the science of how we think, cannot claim dominion over metaphysics because it does not uniquely do so (so too does logic) and since it makes no recourse to truth and falsehood and thus to self-criticism which is the end of thinking (i.e., was my thought successful?). Theoretic thought is logic, practical thought is ethics. Psychology in actuality is not cognitive (as the ancients thought); it is the science of feeling; lacking not only self-criticism but also a science of the body and also an understanding of truth, it is no science at all. Psychology is a pseudo-science which cannot supplant metaphysics and other sciences because it ignores procedure: it is the propaganda of irrationalism, which is not a conspiracy but an epidemic undermining the scientific pursuit of truth.

Elsewhere, Collingwood treats the sequence of physics from Newton (all events have causes) to Einstein (all events are governed by laws, but most have no cause). Physicians escaped the anthropomorphic problems of the 19th century – nature causing things – by concluding there are few causes only behavior according to law. But philosophers and positivists alike extended Kant’s view that every event has a cause. Kant himself considered metaphysics as ‘god, freedom, immortality’. Of his categories of modality – possibility, actuality, necessity – possibility (i.e., something that could be) is a major stumbling block for positivism. The scholastics considered that pagans ended Roman civilization, but it was really the loss of faith in Latin absolute presuppositions.