MCHAP ACCORD discussion on "Rethinking Metropolis: Critical Practice and Architecture in the Americas" in S. R. Crown Hall with Wiel Arets, Jorge Francisco Liernur, Kenneth Frampton, Joshua Prince-Ramus, Jacques Herzog, Christian Undurraga, Alvaro Siza, Cecilia Puga, Chris McVoy, Maria Eva Contesti, Sarah Whiting, and Dirk Denison.