House considers all major evaluation approaches to be based on a common ideology entitled liberal democracy. Important principles of this ideology include freedom of choice, the uniqueness of the individual and empirical inquiry grounded in objectivity. He also contends that they are all based on subjectivist ethics, in which ethical conduct is based on the subjective or intuitive experience of an individual or group. One form of subjectivist ethics is utilitarian, in which "the good" is determined by what maximizes a single, explicit interpretation of happiness for society as a whole. Another form of subjectivist ethics is intuitionist/pluralist, in which no single interpretation of "the good" is assumed and such interpretations need not be explicitly stated nor justified.