When the motorcycle accident dealt my brother’s brain an irreversible blow, he and his wife were living in their newly purchased farmhouse on the fringes of suburban Chicago. Conway* had been waiting to move out of the city’s inner-ring suburbs for years, and each morning on the forested property he woke up exuberant. Shortly after moving in, he built an extraordinary tree house some 60 feet in the air, spanning two trees, with sliding joists under the floor to accommodate sway and a hammock to lie in during sunsets. He loved riding his motorcycle, and before work he’d sometimes take his bike out for a spin on the open roads just a few miles away. His wife, Caroline, loved antiques, and the area was full of shops. They were in their 50s and living in a house they planned to grow old in together. Then, after dinner on a fall day in 2007, Conway hopped on his Harley Softail Classic to go buy ice cream and cigarettes. A drunk driver barreled into him. Conway’s left femur snapped and his skull struck the traffic-warmed asphalt, splattering blood all the way to the road’s shoulder.