Utopia and Arcosanti

It's been 500 years since Thomas More published his great work of social and urban philosophy, Utopia. More's vision inspired the ideal cities of the Renaissance, the garden city movement, Le Corbusier's modernist City of Tomorrow, as well as the Israeli kibbutzim and the hippie communes of the 1970s. It's also inspired the theme for this year's London Design Biennale. Meanwhile, Silicon Valley firms are thinking about future "smart cities." DnA learns about Utopian planning, future -- and past, with a visit to Arcosanti, an experimental community built in 1970 on a mesa in Yavapai County in central Arizona.