Carl Gustav Jung was a Swiss psychiatrist, born in 1875, who would go on to become one of the most influential figures in 20th-century psychology. He originally trained as a medical doctor and began his psychiatric career working in a hospital in Zürich, where he became known for his research into the human mind.

In the early 1900s, Jung began corresponding and eventually working closely with Sigmund Freud, the founder of psychoanalysis. Their early collaboration was deep—they saw each other as intellectual allies, even developed a kind of father and son relationship. But over time, deep differences emerged in their worldviews. Freud wanted to keep psychology rooted in biology and sexual theory, while Jung was drawn toward a broader vision—one that included philosophy, mythology, religion, and even spirituality.

Their relationship ultimately fractured, and by 1914, they had stopped speaking. But Jung didn’t disappear from the psychological world—instead, he broke off and began developing his own system of thought, one that would define his life’s work and give birth to what’s now known as analytical psychology.

Jung spent the rest of his life writing, researching, traveling, and exploring the depths of the human experience—not only through science, but through history, culture, and personal reflection.