Reflections | In ancient China, marriages between relatives weren’t completely taboo
- Although frowned upon today, marriages between affinal relatives, or relatives by marriage, happened in history
- Soon after the Manchus conquered China and established the Qing dynasty the practice fell out of favour

While not strictly speaking a levirate marriage, where a man is obliged to marry his brother’s widow, especially if the deceased brother is childless, the marriage between Henry VIII and his sister-in-law Catherine was arranged for geopolitical expediency.
Its eventual annulment, in 1533, would set in motion several key events in European history, among the, Henry VIII’s excommunication by the pope in Rome, and the birth of the Church of England and Anglican Christianity.
Many cultures today frown upon marriages between affinal relatives, or relatives by marriage, with some even prohibiting them as incestuous. Although such unions do not involve consanguinity, or blood ties, the idea of marrying one’s parents-in-law, siblings’ spouses, step-siblings, and so on, makes most people very uncomfortable.
In ancient and early imperial China – at least among the upper classes – people were not totally averse to marriages between relatives not related by blood. There are a number of examples but these were exceptions to the rule.
