forum for week of 28 November: pragmatism

In regards to the "firm moral principles are ways of summing up the habits of the ancestors we most admire", I feel as if it doesn't ring fully true. We often change who we admire (due to a number of factors), and if there was a one-to-one correlation between the habits of ancestors we admire and our firm moral principles then our moral principles would change very often, and it's just my personal belief that, by-and-large, our moral compass remains roughly the same.