The late great Harvard professor John Rawls famously said that a diversity of opinions on issues relating to morality, religion, and the human condition is a permanent feature of any free society. In other words, division, not uniformity, will characterise liberal democracies regarding many issues of morality.

One of Rawls’ other insights was that even though contradictory sides of a debate cannot both be correct in all respects, they can both still be reasonable to varying degrees.