Recently, I commented about a pair of 21-year-old identical twin female tennis players qualifying for the first time at Wimbledon. Sadly, the twin who advanced to the next round could not fully celebrate the biggest win of her career because her twin sister had lost her match. If you are not a twin, you may find it hard to understand why the victorious twin had to downplay and deflect her success. Let me share Jeffrey Kluger’s definition of altruism from […]