In this graph, the differences aren’t due to age, since everyone is 18 to 29 years old, but we don’t know how much of the shift is due to a generational trend (affecting only young people and not older people) and how much to a time-period trend (with people of all ages shifting in their views). Because the General Social Survey (GSS) includes adults of all ages, we can compare the views of all ages and generations in recent years to see the current generation gaps.
