Our modern-day word for sympathy is derived from the classical Greek word for fellow-feeling. Both in the vernacular as well as in the various specialist literatures within philosophy, psychology, neuroscience, economics, and history, "sympathy" and "empathy" are routinely conflated. In practice, they are also used to refer to a large variety of complex, all-too-familiar social phenomena: for example, simultaneous yawning or the giggles. ...
