Ralph Ellison said this quote

...out of the counterfeiting of the black American's identity [in blackface minstrelsy] there arises a profound doubt in the white man's mind as to the authenticity of his own image of himself. He, after all, went into the business when he refused the king's shilling and revolted. He had put on a mask of his own, as it were...For the ex-colonials, the declaration of an American identity meant the assumption of a mask, and it imposed not only the discipline of national self-consciousness, it gave Americans an ironic awareness of the joke that always lies between appearance and reality, between the discontinuity of social tradition and that sense of the past which clings to the mind. And perhaps even an awareness of the joke that society is man's creation, not God's. Americans began their revolt from the English fatherland when they dumped the tea into Boston Harbor, masked as Indians, and the mobility of the society created in this limitless space has encouraged the use of the mask for good and evil ever since.