Mostly, new people:
One potentially very important mechanism of institutional change is cohort replacement. By that I mean the replacement of old guards of organizational members and leaders with newer cohorts who have different beliefs, opinions, and values.
It’s strange, when you think about it, that institutional theorists haven’t considered in any serious way how cohort replacement affects organizational practices and policies, even though opinion research indicates that cohort differences explain significant variation in beliefs and attitudes. Cohort differences may often matter more than life stage differences in explaining political opinions and attitudes. Take the case of liberalizing beliefs about same sex marriage. One study indicates that about half of the growth in support for same sex marriage is the result of cohort replacement. Younger generations are simply more open to this practice than preceding generations. We can expect that in a couple of generations, same sex marriage will be legal everywhere due to cohort replacement.
