Roger Beaty, Harvard University, on where does creativity comes from: 

Psychology and neuroscience researchers have started to identify thinking processes and brain regions involved with creativity. Recent evidence suggests that creativity involves a complex interplay between spontaneous and controlled thinking – the ability to both spontaneously brainstorm ideas and deliberately evaluate them to determine whether they’ll actually work.

Despite this progress, the answer to one question has remained particularly elusive: What makes some people more creative than others?

In a new study, my colleagues and I examined whether a person’s creative thinking ability can be explained, in part, by a connection between three brain networks.