Chris Carlsson is a writer, San Francisco historian, professor, bicyclist, tour guide, blogger, photographer, book and magazine designer. He's lived in San Francisco since 1978. He has written two books, edited five, including Critical Mass: Bicycling's Defiant Celebration (AK Press: 1992), The Political Edge (City Lights, 2005), Ten Years That Shook the City (City Lights, 2011) and others. He helped co-found Critical Mass in September 1992, and has ridden with Critical Mass rides in a dozen cities on three continents since then. He has been propelled into extended world travels since 2002. He has directed Shaping San Francisco since its inception in the mid-1990s, and continues to be co-director of the archive of San Francisco history at FoundSF.org. He also conducts award-winning bicycle history tours a dozen times a year, and hosts an ongoing Public Talks series in San Francisco.