How funny. I got that same event today as well. The only problem is, is it was in my tribe that has 7,660 hours and has more-or-less been on autopilot for several, several months. Just recently, due to my lack of attention to my tribe, they were down to 28 habitants so I went on a baby making spree. I was able to bring my tribe back to max population but haven't "bonded" with the villagers so I have no idea who left. The funny thing was that when I clicked "OK" for the event, my population was only down by one but I did have some of my females carrying babies so I geuss they decided to repopulate before I even got in there to check on them.