He loved elephants, but he did it to save the land. Then he found it made desertification worse instead of better, and devoted the rest of his life to figuring out why. These are his conclusions and proposed solutions. He and his team have restored desertified grazing land on several continents by increasing grazing herds instead of decreasing them, with careful rotation and movement. It sounds a lot like what Joel Salatin does with his moveable fences and frequently moved cattle herds. It's also a good deal like the restoration of cool oases from hot desert that is described in Gaia's Garden, a favorite permaculture resource in the Texan99 household.
The before-and-after shots are like something out of a dream of Paradise. These are results he's achieving on poor lands with poor people.
H/t Watts Up with That, who's more excited about this than I've ever seen him.