Communitas: Means of Livelihood and Ways of Life is a 1947 book on community and city planning by Percival and Paul Goodman. Presented as an illustrated primer on how city planning affects socioeconomic order and citizens' empowerment to better their communities, the book reviews historical and modern approaches to urban planning before proposing three of the Goodmans' own provocative community paradigms.

Percival Goodman was an American urban theorist and architect who designed more than 50 synagogues between 1948 and 1983. He has been called the "leading theorist" of modern synagogue design, and "the most prolific architect in Jewish history."