εἰκονοκλάστης

In 726 CE, Byzantine Emperor Leo III ordered the destruction of religious images throughout the empire. He believed that veneration of icons had crossed the line from devotion into idolatry. His opponents needed a word for this policy, and they built one from Greek parts: eikṓn (image) and kláein (to break). An eikonoklástēs was an image-breaker. The word was an insult. Nobody who smashed icons called themselves an iconoclast.

The Byzantine Iconoclasm lasted, with interruptions, for over a century. Monks hid icons in monastery walls. Painters were imprisoned. The theological arguments were dense and serious: could a painting participate in the holiness of its subject, or was it just pigment on wood? The Second Council of Nicaea in 787 restored icons, but the controversy erupted again from 814 to 842. When it finally ended, the word iconoclast remained in Greek as a historical term for a specific imperial heresy.

The Protestant Reformation revived the practice. In 1566, Calvinist mobs swept through the Netherlands in the Beeldenstorm, smashing stained glass and statuary in Catholic churches. English Puritans did the same in the 1640s. The word iconoclast was ready-made for these events, and English adopted it by the seventeenth century. But already by the 1600s, writers were using it figuratively — an iconoclast was anyone who attacked established beliefs, not just religious images.

The figurative meaning consumed the literal one. By the twentieth century, iconoclast was almost entirely a compliment. Jazz musicians, abstract painters, startup founders — anyone who rejected convention could be called iconoclastic. The insult became praise. The word that meant destroyer of sacred art now means courageous original thinker. Leo III's opponents would not have predicted this.