Marriage equality and the “right side of history”
The slogan “Join the right side of history!” assumes at least one of the following:
1) That opponents of same-sex marriage actually know deep down that same-sex marriage should be legal, and just need a bit of prompting.
2) Opponents care more about the judgment of future people than for their current peers, consciences, or God.
3) All historical trends should be supported because the future is always better in every way.