Like some of man's oldest forms of folk art, the snowman is, and always has been, a byproduct of man’s primal instinct to depict himself in art, be it a cave painting or a sculpture made out of snow. A frozen Forrest Gump, he's a reflection of our own development. The snowman's history spans the Renaissance, the early years of the American colonies, even the Franco-Prussian War. But one of his most intriguing eras was the "Dean Martin Years," a period of excessive drinking and questionable activity.
Smithsonian: Snowman Gone Wild