 Arguably the most important work of the Hyperion group was Análisis del ser del mexicano (1952) by Emilio Uranga. This book proposes an ontology of mexicanidad and a philosophy of Mexican culture. According to Uranga, the negative traits that characterize the Mexican, such as resentment, melancholy, and zozobra, are expressions of a constitutive mode of Mexican existence that he calls “accidentality”. (Here Uranga is employing the Scholastic distinction between accident and substance.) Uranga argues further that although Mexicans had been made to feel inferior throughout their history—specifically, although Europeans had argued that Mexicans were less than fully human—Mexicans were in fact closer to the essence of being human, defined as accidentality. As a result, it was the European who had a lesson to learn from the Mexican, not the other way around. If the Conquest of Mexico tried to assimilate Mexican culture to European culture, what Uranga did was try to assimilate the whole of what it means to be human to the Mexican experience of humanity, that is, to make humanity recognize and value its repressed accidentality. By identifying mexicanidad with accidentality, Uranga transforms Mexican being into an ontological category.