50% of who you are is decided before birth: Neuroscientist Nikolay

NYU neuroscientist Nikolay Kukushkin said on the podcast that he'd intuitively put personality at 50% genetic and 50% shaped by culture, education and experience. Watching his nieces from three months to their teens, they were "the same person", he said. "You can't hope to change 100%...but you can always change some," he added.