Hassan Masum joins the roster of WorldChanging contributors today. He's a problem solver by training and temperament, with a strong grasp of technology and a strong bias towards positive, creative outcomes. Much of his work focuses on developing and understanding tools for collaborative development, and one of his best-received works is his essay (with Yi-Cheng Zhang), Manifesto for the Reputation Society, which explores the how reputation mechanisms found on websites such as Slashdot, eBay, Amazon and others may scale up to be a broader phenomenon. Like many of us here, Hassan also works with scenarios as a tool for understanding social, technological and economic change.

We greatly look forward to seeing his insights and ideas here at WorldChanging. Welcome, Hassan!