Complex sentence: O’Keefe, T. (2005) Epicurus argued that the behavior of humans from infancy to adulthood sought out pleasure, and even altruism and honorable or virtuous acts are performed to increase the well being of the self.
Split into simpler sentences: O’Keefe, T. (2005) Epicurus argued evidence of human behavior being motivated by pleasure can be found from infancy to adulthood. Humanity performs altruistic, honorable, and virtuous acts to increase the well being of the self.