Mike, you probably know by now that I'm of the opinion that nutrient, vitamin, and [wiki2="Vitamin-and-Mineral-Deficiencies"]mineral deficiency[/wiki2] in genetically and/or environmentally susceptible individuals plays a huge role in the pathogenesis of Crohn's. I know you're big on the timeline stuff so here's a paper for you showcasing how whole foods has become 5-40% less nutrient dense. I'm not talking the processed foods so many eat, I'm talking fruits and veggies being less nutrient dense.