While Americans tend to smile quite a bit, that doesn’t happen in other countries. Did you know, for example, that in countries such as India and Russia, people assume you’re not intelligent if you smile too often? Or that in other countries, it’s a sign of disrespect to grin? It turns out that in America—with our extremely diverse culture—we smile to gain trust and friendship. Our culture has always been about smiling, but this video delves into the history of our grins.