Who are the fathers of secular humanism?

Humanism began as the scholarly aspect of the Rennaissance and developed into the Enlightenment. It is called "Secular" Humanism by the benighted enemies of the Enlightenment. Some of its fathers are Petrarch, Chrysoloras, Valla, Erasmus, Poggio, Ciriaco, Pope Pius II, Leonardo Bruni, Sir Thomas More.