response: I don't know it's origins, but it was popular in the Roaring Twenties and early 30s, as well as the 1950s, 1970s, and 1990s.
original_response: I'm unsure of its earliest origins, but the earliest popularized date of the shirt I'm aware of is from the 1930s.  I'm sure it's been around for longer.
history: I wear cardigans because I look classy and cultured. Well, cardigans are mostly associated with the Roaring Twenties' college culture. That's cool, do you know when they were first made?
knowledge: The garment is mostly associated with the college culture of the Roaring Twenties and early 1930s, being also popular throughout the 1950s, the 1970s and the 1990s.