I've been thinking about another similarity shared among all humans: love. What culture doesn't celebrate love? Across the entire planet, across the centuries of our species' civilizations, we have always loved. The most prevalent stories we tell revolve around the love between two people. Mythology and legend often centrally feature romance. We go beyond our normal limits for love. We do irrational things for those whom we love. Biological organisms act in their self interest in order to reproduce and pass on their genetic information, yet human beings often act against their self interest because of love. We may completely disagree with another, or not understand one's way of life at all, but do we all love? It defines us, across ethnicity and culture, across geography and space, across generations and time. It defines us as a species. To be human is to love. And when we recognize this shared purpose, we are capable of uniting humanity. As Bob Marley indicated, we are one. One species, together, united by love. One love.