David Hume (; born David Home; 7 May 1711 NS (26 April 1711 OS) - 25 August 1776) was a Scottish philosopher, historian, economist, and essayist, who is best known today for his highly influential system of philosophical empiricism, skepticism, and naturalism. Hume's empiricist approach to philosophy places him with John Locke, Francis Bacon and Thomas Hobbes as a British Empiricist.

In the introduction to A Treatise of Human Nature, Hume wrote, "'Tis evident, that all the sciences have a relation, more or less, to human nature ... Even Mathematics, Natural Philosophy, and Natural Religion, are in some measure dependent on the science of Man." He also wrote that the science of man is the "only solid foundation for the other sciences" and that the method for this science requires both experience and observation as the foundations of a logical argument. On this aspect of Hume's thought, philosophical historian Frederick Copleston wrote that it was Hume's aim to apply to the science of man the method of experimental philosophy (the term that was current at the time to imply Natural philosophy), and that "Hume's plan is to extend to philosophy in general the methodological limitations of Newtonian physics".  Until recently, Hume was seen as a forerunner of logical positivism; a form of anti-metaphysical empiricism. According to the logical positivists, unless a statement could be verified by experience, or else was true or false by definition (i.e. either tautological or contradictory), then it was meaningless (this is a summary statement of their verification principle). Hume, on this view, was a proto-positivist, who, in his philosophical writings, attempted to demonstrate how ordinary propositions about objects, causal relations, the self, and so on, are semantically equivalent to propositions about one's experiences.  Many commentators have since rejected this understanding of Humean empiricism, stressing an epistemological (rather than a semantic) reading of his project. According to this opposing view, Hume's empiricism consisted in the idea that it is our knowledge, and not our ability to conceive, that is restricted to what can be experienced. Hume thought that we can form beliefs about that which extends beyond any possible experience, through the operation of faculties such as custom and the imagination, but he was sceptical about claims to knowledge on this basis.

Using a quote from the above article, answer the following question: Was his writings all about psychology  ?
Philosophy,