Loisaida as Urban Laboratory is the first in-depth analysis of the network of Puerto Rican community activism in New York City’s Lower East Side from 1964 to 2001. Combining social history, cultural history, Latino studies, ethnic studies, studies of social movements, and urban studies, Timo Schrader uncovers the radical history of the Lower East Side. As little scholarship exists on the roles of institutions and groups in twentieth and twenty-first-century Puerto Rican community activism, Schrader enriches a growing discussion around alternative urbanisms. Loisaida was among a growing number of neighborhoods that pioneered a new form of urban living. The term Loisaida was coined, and then widely adopted, by the activist and poet Bittman “Bimbo” Rivas in an unpublished 1974 poem called “Loisaida” to refer to a part of the Lower East Side. Using this Spanglish version instead of other common labels honors the name that the residents chose themselves to counter real estate developers