When Fraser Taylor was doing research in 1970’s in Kenya, he had an experience that gave him a window into the worth of local wisdom. A multi-million dollar aid project to map soils was in the works in one of the districts. Some locals asked Fraser what all these “wazungu” (foreigners) were doing. When Fraser explained, one man picked up a stick and in a few minutes drew a map in the sand showing soil suitability for various crops which was just as accurate (and much cheaper) than the