Mugabi, Hearns and Jones had good power and great power, but Jackson had the kind of power which Mugabi and Hearns and Jones could not knock out Hagler, Jackson might have been able to if he connected. He had the power to demolish the best chins.. Why? I am not sure. Those other guys had power where they had nights where the opponent would not go down. Jackson usually knocked down who he hit clean. And after 1988 he got even better.