I am a psychological anthropologist studying how humans cooperate. My focus is on how universal relational models are culturally implemented so as to enable people to understand each other and evaluate their interactions. I have researched moral psychology, motivations for violence, and the ways that people construct relationships. Lately, I have been studying an emotion, kama muta, that emerges when any kind of love suddenly intensifies. The capacity for kama muta is an innate adaptation, while a great many cultural practices and arts have culturally evolved to evoke it. Kama muta bonds people, generating kindness, devotion, and commitment.