A study just published in the New England Journal of Medicine (4/20/2000) concluded that low fat, high fiber diets offered no protection from colon cancer. The New England Journal Of Medicine ran another study last year (1/21/99, 340:169-176, 223-224) that concluded that higher fiber intake might actually increase one's risk of colon cancer.
Argentina consumes more beef per person than America, yet they have much lower colon cancer rates than Americans.
Students of traditional diets know that a high fat and protein intake, coupled with a low fiber intake does not create colon cancer, or any other cancer for that matter.
This has clearly been seen in the cultures that have lived traditional lives consuming mostly meat. The Masai of East Africa, for example, before they modernized themselves, subsisted for centuries on beef, milk, and blood with very small amounts of fruits and almost no vegetables. In fact, they regarded veggies as "cow's food."
This is also borne out by epidemiological data as well. For example, Argentina consumes more beef per person than America, yet they have much lower colon cancer rates than Americans.