You should just smile at strangers a lot

This is so basic I feel stupid for saying it in such an intellectual place. But most of you guys share my enthusiasm for effective altruism, and here’s something really altruistic and really effective that I’ve been doing for two decades and I think lots of you should do too.

Just smile at strangers. Walk down the street with a default smile on your face, seek eye contact and just keep smiling. You don’t need to do anything else, not talk to them or anything.

This is tiny, but it’s a pretty unadulterated good thing. Facial feedback research is clear, smiling does make you feel better. It costs basically nothing, and definitely less than you get back in good feelings for yourself. It’s a quality of life improvement for everyone involved.

After what has to be hundreds of thousands of such micro-interactions, I can report that nearly half of the strangers will smile back, although often they’ll look away as they do. This is probably highly dependent on the culture where you do this, especially on whether it is a high-trust environment.

I have learned not to smile at beggars, though. They usually took it as an invitation to target and haggle me.

To be fair, I’m a male and I don’t know if a female doing this would get very different reactions. Maybe some of you want to try it and report back?