Abstract
This essay offers a broad historical exploration of the apeiron, the ancient principle of boundlessness and indeterminacy first brought to light by Anaximander in the 6th century BCE. Early Greek philosophy’s struggle with the apeiron and apeiron’s subsequent repression during the Renaissance and Enlightenment are noted. In the nineteenth century, apeiron is resurgent in science, art, and other fields—only to be repressed again with the early twentieth century rise of modernism. But with modernism's collapse into postmodernism, once again the apeiron comes to the fore. The conclusion reached is that the apeiron can be effectively contained only by consciously acknowledging and accepting it as part of the process of individuation.