Humanist revival of Greek and Roman texts, spread by the printing press, challenged the institutional power of universities and the Catholic Church. This shifted education away from a primary focus on theological writings toward classical texts and new methods of scientific inquiry. (1.1.1.B)

Illustrative Examples:
How do the examples separately below represent the idea above?
Leonardo Bruni-
Leon Battista Alberti-
Nicocolo Machiavelli-