In a 2011 Scientific American article, behavioral therapist Andrea Kuszewski reinforced a concept that continues to gain traction today--namely, that it's possible to improve one's native intelligence.
In the past, even respected scientists assumed that intelligence was purely genetic and unlikely to change over time.
Nowadays, neuroscientists and cognitive therapists recognize that fluid intelligence (e.g., the capacity to learn and process new information) is the reality.
More importantly, people can boost their fluid intelligence by improving their working memory. But how?
According to Kuszewski, you don't have to be a genius to improve cognition. Even those with low IQs can grow in fluid intelligence. To quote the author, "what doesn't kill you (will make) you smarter."