People tend to think that life goes downhill as you age, but the research shows the opposite is true: lifetime happiness tends to be U-shaped, with most people getting happier as they get older. Why? My column in the January 26 edition of The Southern Star discussed this important subject, and is reproduced below. As you get older, your looks fade. Mentally, you become less sharp and your memory declines. Your physical health suffers. And you get happier. Well, not everyone gets happier as they...