The humanism made people emphasise the potential in human beings and human brain. Instead of wondering about god and philosophical questions the thinkers focused on more down-to-earth issues. This led to quick development of social studies, architecture, art and biology. This was a chain reaction like when people quit believing that deseases were god's punishment and started to examine human body, they learned the basics of all living organisms, that led to development of chemistry and engineering medical tools etc...