In her book Grit, social psychologist Angela Duckworth…

““In her book Grit, social psychologist Angela Duckworth identifies the single quality that most marks those who succeed in life, those who feel fulfilled, from those who find life one long series of frustrations. The quality boils down to this: the understanding that your personality and character are not fixed but can be shaped and strengthened by overcoming difficult experiences. There are voices in everyone’s head that resist that fact, that tell us we will never achieve this or that, so there is no point in even trying. Again, our business was designed to help silence a few of those voices. One of the questions we asked ourselves when we created Tough Mudder was this: How do you create a culture and an authentic experience that will reliably deliver grit, a quality that people seem to crave but don’t know how to find? This craving, our grit-shaped hole, feels like a recent phenomenon. It is a by-product perhaps of our fortune in living, in the Western world at least, in largely peaceful times, when work is more likely to involve generating a PowerPoint presentation than any kind of hard labor. When—to put it in blunt evolutionary terms—millennia of hunting and gathering have been replaced by a trip to the supermarket. Ease and convenience are great in their way, but for many of us life no longer routinely presents the kind of challenges that once developed resilience—and genetically, psychologically, I believe we miss those challenges. In most other times and places those trials came hard and fast, and though we might not always have welcomed them, they allowed us to show what we were capable of, gave us a sense of purpose in ourselves, and a sense of belonging in our community.””

— Will Dean