We humans are social beings. We live with others. We need each other. It takes a village to raise a child, as an African saying has it. The need for partners, colleagues, and friends applies to almost anything else as well. Also, as more and more people live in cities, while home, work, and recreation have become distinct spheres of life, the circle of others we interact with has expanded enormously. We have even come to speak of the “global village,” though that suggests too much familiarity.