"David Hume made three major contributions to ethics. The first was the naming and consistent application of “the principle of utility.” The second was his account of sympathy. The third, no less important than the others, was to point out not only that we must adhere inflexibly to general rules of action, but why this is essential to secure the interests and happiness of the individual and of mankind."

https://mises.org/daily/6500/The-Need-for-General-Rules#.UgUJWracMuU.twitter