Will people trade a little more privacy to stop a global disease pandemic? Sadly, probably not. The tragedy of the commons is that humans are not very good at taking personal action to solve collective problems. The trick to revolutionary change is finding ways to make self-interest align with the common good. For people to accept widespread biometric tracking in a way that could help us get ahead of fast-moving deadly viruses, they’ll need to be offered something they have a hard time seeing themselves without.