Reaching the age of 100 is no longer as rare as it once was. Around the world, certain countries stand out for having unusually high numbers of centenarians. While genetics matter, research consistently shows that lifestyle, diet, healthcare access, social connections, and daily routines play a much larger role in extreme longevity. Below are 15 countries where living to 100 is more common than in most, with each entry expanded to highlight why these places…