What ethical values were previously not allowed but now are?

A:

At first glance, it seems a paradox that certain ethical values were once not allowed, but it is true. We now regard religious tolerance as an important ethical value, but this was certainly not allowed anywhere in Europe from the fourth century right up to at least the time of the Reformation. In fact tolerance of non-Christian religions is a quite recent phenomenon. In most Muslim-majority countries, religious tolerance still has not been achieved.