Its easy to lose sight of social change too.
In 2008, when Joe Biden debated Sarah Palin, they both supported civil unions over gay marriage because that was the centrist position at the time.
When the author was born, the USA was over 90% christian, and less than 5% of people had no religion. Today the country is closer to 70/20.
When the author was born, black people were still being lynched.