 To develop their classification, they scoured writings from traditions such as Confucianism, Buddhism, ancient Greek philosophy, and medieval Islam. They examined lists of traits from Charlemagne, Benjamin Franklin, the Boy and Girl Scouts, Hallmark greeting cards, and Pokémon characters (2004: 15, 33–52). Naturally they came up with a huge list of traits, and needed some criteria to use to pare them down. Here are the 10 criteria they came up with (2004: 17–27):