Gender in the 25th Century

In the millennia before the Church War, the presence or absence of a Y chromosome in one's genome was of great importance in determining one's social status. In the twenty-fifth century, mainstream cultures no longer divide people into female and male social roles. In English, gendered pronouns such as 'she' and 'he' are approximately as rare as 'thou' and 'thee'. The singular 'they' is ubiquitous. Sex chromosomes no longer determine romantic options, salary, hair length, voting rights, or pronouns. Trying to put someone into a gendered category is considered variously disrespectful, offensive, barbaric, perplexing, nonsensical, or false.

Notable Anachronisms
The bizarre writings of Mycroft Canner wilfully use the style of the eighteenth century, and in so doing describe modern people using gendered pronouns. The logic by which some people are called 'she' and some called 'he' is known only to Servicer Canner.