dr jim kim, the 12th president of the world bank group. during the conversation we dug into a subject of great concern - combatting the life-time effects of severe stunting. >> i'm with dr jim king on today's "inside story". ♪ ♪ you mentioned children in extreme poverty, it requires a world where we take the long view of human personhood, where it's important to support 3-year-olds, because we are worried about what 25-year-oldses they'll be. do we have that kind of world? >> i think so. there's a tremendous amount of interest in the issue, and it has been driven by fantastic research. we know more about it now. some is chilling. we know that without the right nutrition and the right stimulation children develop the connection. >> there are things like the serve and volley, they are expecting a response from someone. when they don't get it. the stress hormones shape the structure of the human being. there's evidence that you can make a difference. literally there's few studies, but a great one from al jazeera america there was a group. studented children. they know all kinds of interventions, and the only intervention making a difference o young people going to the homs of stunt