The Old Firm's success is based on sectarianism and the continued fostering of it. Glasgow has a population 1.5 times that of Edinburgh but the old firm attract 112,000 thousand fans compared to an average of around 38,000 combined for Hibs and Hearts. The Old Firms global fan base is similarly huge and again rooted n sectarianism. The gate revenues and them taking the majority of the TV money explains their dominance. Nothing else