Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A personal and/or cultural value is an absolute or relative ethical value, the assumption of which can be the basis for ethical action. A value system is a set of consistent values and measures. A principle value is a foundation upon which other values and measures of integrity are based. Those values which are not physiologically determined and normally considered objective, such as a desire to avoid physical pain, seek pleasure, etc., are considered subjective, vary across individuals and cultures and are in many ways aligned with belief and belief systems.