I'm not sure I buy their list of what makes people live longer, but I found it interesting that 3/5 locations seem to be ~40 degrees north latitude (and 3/5 islands, all locations are very near oceans/seas). It makes sense that all locations would be in warmer areas, as that vastly reduces the dependency on meat consumption, but more bias towards the equator would be expected if that was all. 40 south only touches the edge of Australia and the tail of South America, but I wonder how the life expectancy compares?