First documented in June 2015 on Twitter. Currently active and in regular use across social platforms since 2015.
Intentional communities: private homes, shared common facilities (kitchen, dining, workshops). Danish origins 1970s. US adoption 2000s-2010s. Social connection, aging-in-place, sustainability. Higher upfront costs. Nevada City Cohousing, EcoVillage Ithaca models.
Sources: Academic urban planning journals, city planning documents, ArchDaily, The Urbanist, Strong Towns blog, CNU publications.
Carlos Moreno's concept: all daily needs within 15-min walk/bike
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