By Megan Buerger, The Washington Post Design trends come and go, but is mid-century modern forever? The minimalist movement that first swept through U.S. suburbs in the 1940s and ’50s has gone through so many streaks of popularity over the years that it’s beginning to feel like a design staple. The current craze, which has lasted nearly two decades, is so overwhelming that mid-century modern dominates nearly every corner of the retail market, from Craigslist to West Elm to Sotheby’s. So what’s behind our mid-century modern obsession?