Don Draper's Hidden Past
Don Draper is not who he says he is, and that lie is the engine of the entire show. His real name is Dick Whitman—a poor boy from the Midwest who invented a new identity to escape his past—and he spends every season running from the truth while climbing higher, first at Sterling Cooper and later at the new agency he helps found, Sterling Cooper Draper Pryce. The gap between the man everyone sees (charming, sophisticated, commanding) and the man he actually is (scared, ashamed, desperate) creates every major conflict in the series, from his marriage falling apart to his colleagues turning against him.
Understanding Don means seeing how the 1960s advertising industry both enabled and demanded his deception. Advertising itself is about selling a false image—making people want things by attaching them to idealized versions of life—so Don's skill at crafting lies for clients mirrors his skill at lying about himself. He's brilliant at the job precisely because he knows how to construct a persona from nothing. But unlike a commercial that ends after thirty seconds, Don's lie has to hold up under constant pressure: his wife, his boss, his coworkers, and eventually his own conscience all threaten to expose him.
The real tension isn't whether people will find out—they do—but whether Don can ever stop running long enough to become the person he pretends to be, or whether his past will always catch him.

