Morality (from the Latin moralitas "manner, character, proper behavior") is the differentiation of intentions, decisions, and actions between those that are good (or right) and those that are bad (or wrong). A moral code is a system of morality (according to a particular philosophy, religion, culture, etc.) and a moral is any one practice or teaching within a moral code. The adjective moral is synonymous with "good" or "right." Immorality is the active opposition to morality (i.e. good or right), while amorality is variously defined as an unawareness of, indifference toward, or disbelief in any set of moral standards or principles. An example of a moral code is the Golden Rule which states that, "One should treat others as one would like others to treat oneself."

Ethics (also known as moral philosophy) is that branch of philosophy which addresses questions about morality. The word 'ethics' is "commonly used interchangeably with 'morality' ... and sometimes it is used more narrowly to mean the moral principles of a particular tradition, group, or individual." Likewise, certain types of ethical theories, especially deontological ethics, sometimes distinguish between 'ethics' and 'morals': "Although the morality of people and their ethics amounts to the same thing, there is a usage that restricts morality to systems such as that of Kant, based on notions such as duty, obligation, and principles of conduct, reserving ethics for the more Aristotelian approach to practical reasoning, based on the notion of a virtue, and generally avoiding the separation of 'moral' considerations from other practical considerations."

Dan Ariely (born April 29, 1968) is an Israeli American professor of psychology and behavioral economics. He teaches at Duke University and is the founder of The Center for Advanced Hindsight.Ariely's talks on TED have been watched 2.8 million times. He is the author of Predictably Irrational and The Upside of Irrationality, both of which became New York Times best sellers.

Dan Ariely was born in New York while his father was studying for an MBA degree at Columbia University. The family returned to Israel when he was three. He grew up in Ramat Hasharon. In his senior year of high school, he was active in Hanoar Haoved Vehalomed, an Israeli youth movement. While preparing a ktovet esh (fire inscription) for a traditional nighttime ceremony, the flammable materials he was mixing exploded, causing third-degree burns over 70 percent of his body.

Ariely was a physics and mathematics major at Tel Aviv University, but transferred to philosophy and psychology when he found the writing too physically taxing. However, in his last year he dropped philosophy and concentrated solely on psychology, in which he received his B.A. He also holds an M.A. and Ph.D. in cognitive psychology from the University of North Carolina at Chapel Hill. He did a second doctorate in business administration at Duke University at the urging of Nobel economic sciences laureate Daniel Kahneman.