Test by looking at other countries and see if the obvious prediction from the hypothesis holds? Divorce rates are easy to obtain, but it might be tough to come up with objective ways of measuring how much family members are involved. Alternatively, pick a single country like the US where the divorce rate has gone up a lot over the last hundred years and see if the amount of emphasis on family members has changed.
Test by looking at other countries and see if the obvious prediction from the hypothesis holds? Divorce rates are easy to obtain, but it might be tough to come up with objective ways of measuring how much family members are involved. Alternatively, pick a single country like the US where the divorce rate has gone up a lot over the last hundred years and see if the amount of emphasis on family members has changed.