What is society? : Juichi Yamagiwa and Shun Hongo (2020) Evolution of human sociality, vol 1. Primatology as a study of society. iCardbook. Shishousa, Tokyo; Juichi Yamagiwa and Shun Hongo (2020) Evolution of human sociality, vol 2. The past, present, and future of a society with empathy and family. iCardbook. Shishousa, Tokyo.