What if one of the most familiar symbols in your life has a far stranger history than you ever imagined? In this episode, we take a deep dive into the letter I and uncover how this simple vertical stroke became one of the most important symbols in language, identity, typography, mathematics, and modern communication. What looks like the most ordinary character on your keyboard turns out to have roots stretching back to ancient Egyptian hieroglyphs, Semitic language shifts, Greek adaptation, Roman writing, medieval scribes, and the digital systems that power modern life.

This episode explores how the letter I began as a pictorial symbol of a human arm, how it evolved across civilizations, and why it eventually split from J after centuries of overlap. It also explains the hidden logic behind the capitalized English pronoun “I ...