How did 18th-century anthropology approach the study of human nature?

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In the 18th century, "anthropology" was not a distinct empirical science but a branch of philosophy dedicated to providing an account of human nature. During this period, almost all systematic knowledge was categorized under philosophy; for instance, physics was termed "natural philosophy," and economics was part of "moral philosophy".1

The study of human nature in the 18th century was characterized by several key approaches:

  • Science of Human Nature: Thinkers like David Hume sought to replace rationalist methods with empirical inquiry to establish a true science of human nature.2
  • Moral Sense: Influenced by the 3rd earl of Shaftesbury, many philosophers argued that humans possess a natural "moral sense"—a capacity for benevolence and sympathy—that balances self-interest.3
  • Social and Political Theory: Philosophers such as Jean-Jacques Rousseau used the "state of nature" as a hypothesis to critique contemporary society and explore the foundations of legitimate authority, liberty, and equality.4

Rather than serving as a primary field of research, 18th-century anthropology functioned as a review of the implications of broader philosophical doctrines, often incorporating empirical observations that would later be classified as psychology.1