IDU: Why are some people more successful?

We all know some people are more successful than others, but what determines that success? According to our next guest, it all comes down to grit, a combination of passion and perseverance. So is that something anyone can learn? CEO of Character Lab Angela Duckworth joins William Shatner on this week's episode of 'I Don't Understand' to discuss what makes some people more successful than others.