History & Area Studies / Thematic History / Comparative Transregional History

The Invisible Ruler: How Comparison Controls Reality

Practices of Comparing

Angelika Epple, Walter Erhart, Johannes Grave

Ever been told you cannot compare apples and oranges? Society lied to you. Comparison is never just an innocent mental reflex. It is one of the most powerful, invisible weapons in human history. It sparks arms races, legitimizes empires, manufactures artificial anxiety, and rigs reality without you ever noticing. Whenever two separate things are forced onto the same scale, someone secretly invents a hidden ruler. Whoever sets that standard controls the outcome. From 18th-century debates over Mexican fruit to prove imperial supremacy, to Cold War propaganda spreadsheets, college rankings, and the algorithms curating your daily feeds, comparison does not merely observe reality. It aggressively manufactures it. Drawing on the groundbreaking collaborative research in Practices of Comparing, spearheaded by renowned scholars including historians Angelika Epple and Walter Erhart alongside art historian Johannes Grave, this breakdown exposes the hidden mechanics of how comparisons govern society. Their work examines how comparative acts establish dominance, generate artificial competition, and dictate cultural values across centuries. Arm yourself with intellectual self-defense, decode the arbitrary metrics designed to make you feel insecure, and discover who really handed you the ruler you use to judge your own life.