Why more people should embrace boxing, from The Economist's 1843:
Boxing and canoeing are more energy-sapping, though less accessible. According to the Sports and Fitness Industry Association, 48m Americans pulled on their running shoes in 2015 (the country has a similar proportion of joggers to Australia, with Britain trailing). By contrast, just 5m Americans strapped on a pair of boxing gloves.
Of course, I'd first suggest either Muay Thai or Brazilian jiu-jitsu. However, traditional boxing has certainly been proving itself as a wonderful crucible for learning many of the basic principles of combat sports and of fighting in general, one only need ask Cody Garbrandt or Conor McGregor.