How to Keep Catholic Rules, and Bend Them

IS IT even theoretically possible (leave alone whether it's desirable) for one man to lay down a single set of moral rules to govern the fundamentals of human life, including relationships and reproduction, across the whole world? That's a real question. After all, basic terms like marriage, partnership, family or household can have utterly contrasting connotations in different social and economic settings. Those words signify one thing among prosperous city-dwellers who can choose where, how and with whom to live, and quite another in a poor, rural community where every aspect of the daily grind is massively constrained by traditional cultures and economic needs.