At TEDGlobal U, Cameron Sinclair shows the unreported cost of real estate megaprojects gone bust: thousands of migrant construction laborers left stranded and penniless. To his fellow architects, he says there is only one ethical response.

2006 TED Prize winner Cameron Sinclair is co-founder of Architecture for Humanity, a nonprofit that seeks architecture solutions to global crises -- and acts as a conduit between the design community and the world's humanitarian needs.

After training as an architect, Cameron Sinclair (then age 24) joined Kate Stohr to found Architecture for Humanity, a nonprofit that helps architects apply their skills to humanitarian efforts. Starting with just $700 and a simple web site in 1999, AFH has grown into an international hub for humanitarian design, offering innovative solutions to housing problems in all corners of the globe.

Whether rebuilding earthquake-ravaged Bam in Iran, designing a soccer field doubling as an HIV/AIDS clinic in Africa, housing refugees on the Afghan border, or helping Katrina victims rebuild, Architecture for Humanity works by Sinclair's mantra: "Design like you give a damn." (Sinclair and Stohr cowrote a book by the same name, released in 2006.)

A regular contributor to the sustainability blog Worldchanging.com, Sinclair is now working on the Open Architecture Network, born from the wish he made when he accepted the 2006 TED Prize: to build a global, open-source network where architects, governments and NGOs can share and implement design plans to house the world.