OP here. I did like the metaphor of each group laying foundations for the next group. I might not have gotten this across, but I also feel like there is a sor

OP here. I did like the metaphor of each group laying foundations for the next group. I might not have gotten this across, but I also feel like there is a sort of ‘terraforming’ aspect too - each group ushers in the next group, which in turn changes things to a point where the previous group gets less and less comfortable.