Why did the attitude towards man change so much in Italy in the 15th century?

The country was fragmented, but rich, people had time and money, as well as a huge number of artifacts that inspired works of art, and since a person became more free when he ceased to be forced to survive.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.