I remember my mother's two aunts living with her, her father and her brother after my grandmother died. I remember my other grandmother's sister living with family. I don't remember a single person living alone in my extended family.
But people started living alone in greater numbers in the 1920s, congregating in Greenwich Village in New York because of the closeness and small apartments. By the 1930s, Sweden had begun building a cooperative living building with common living and dining areas for single people.
Yet 80 years on, most single people still live alone. Dense communities will help, and maybe be the answer. With Gen X pioneering more common areas in apartment buildings, maybe they will lead us into a 'community family.' Your thoughts?