"Enormous research efforts have been made to understand and reverse desertification, but until recently, and with one remarkable exception, to no avail. That exception, Operation Hope, has transformed 6,500 acres of parched and degraded grasslands in Zimbabwe into lush pastures replete with ponds and flowing streams - even during periods of drought. Surprisingly, this was accomplished through a dramatic increase in the number of herd animals on the land. Behind Operation Hope is an approach called 'holistic management', which they apply to rangeland practice. Developed over the past 50 years by Operation Hope founder Allan Savory, a former wildlife biologist, farmer, and politician, it challenges the dominant theory that desertification is caused by overgrazing."