This paper reviews the effects of revolution operator in Imperialist Competitive Algorithm (ICA). The Imperialist Competitive Algorithm that was recently introduced and this algorithm has shown its good performance in optimization problems. This novel optimization algorithm is inspired by socio-political process of imperialistic competition in the real world. This algorithm converges fast but in high dimensional problems, this algorithm easily stuck into local optima. The strategy of this algorithm for escaping from local optima is revolution operator. The revolution is an operator which changes the position of a spot. The revolution operator can be applied in N different form for...