Probably the Gallup Poll organization knows as much about what the public thinks as anyone. Assuming people lie to poll takers equally.
Gallup say in the 50 years since Woodstock some attitudes have changed.
Religion and Pot

Interracial marriage and Abortion

Vote for a Woman or Black

Ideal family and Premarital sex

Woman's lifestyle and Same sex relations.
You'd never know it listening to politicians.