Appeal to tradition
Appeal to tradition is the fallacy that something is good or correct because it is old.
- "The electoral college has existed for over 200 years, so we shouldn't start changing our electoral system now."
- "I attend First Baptist Church because it's the church my father attended, and his father before him, all the way back to when it was founded."
The mere fact that something is old does not mean that it is good: throughout most of human history, people have kept slaves, but slavery is now universally recognized as being evil. On the other hand, people have lived in houses for thousands of years as well, but that does not mean that we should stop building houses: old ideas can be good as well.
Sometimes, conditions changes so that the reasons that originally supported an idea no longer hold. For instance, in the 17th century when the US constitution was ratified, travel was difficult and news traveled slowly, so it made sense for voters to elect a representative who would travel to the capital, learn about the presidential candidates, and vote on behalf of the people in his state. With the advent of mass media, however, individual voters can easily learn about the candidates, so this particular justification for the electoral college no longer holds.