In preagricultural societies, social roles were few and were easily predicted for each phase of a person’s life.
Setup
Causality (accordingly)
In preagricultural societies, social roles were >> interpersonal relations few / predictable were stable / predictable
In modern societies social roles are incredibly many .....
Evaluate
It looks like they're setting up the ol' Flip the Causal Difference Maker.
If they tell us that drinking tons of water before a race increases your likelihood of cramping during the race, then we can say .
Since they told us that having few social roles meant that interpersonal relations were stable and predictable, we can say that in modern society where we have tons of social roles, interpersonal relations will be less stable / less predictable.
Goal
Let's look for an answer saying, .