What if we could eradicate mosquito-borne illnesses with a simple trick of molecular biology? Human-engineered gene drives have been getting a lot of media attention lately because some believe they will allow us to do just that. But will gene drives live up to the hype? My latest feature for the Genetics Society of America addresses this issue. I interviewed experts in population genetics to get a better understanding of how gene drives might work in the wild, and what I learned left me with an even stronger appreciation of the power of evolution.