International Transgender Day of Visibility falls annually on March 31, though even the most casual observer must wonder if we still need a day to mark it. In the three years since Caitlin Jenner transitioned there has been an explosion of transgender visibility. What might be lacking is an International Day of Transgender Understanding. Western society has been keen to affirm trans people, and that is to be welcomed, but it has been slower to think critically about the wider impact of legislative change, and particularly the effect on women and their right to organise and associate as a biological sex. Muddled thinking about sex and gender, and what it means to be male or female, also threatens the credibility of transsexual people who transition to escape the chronic and debilitating effects of gender dysphoria. I know that struggle first hand. I can recount the standard trans narrative of discomfort with my sex from a very early age. Throughout childhood I yearned to be female but concrete reality displaced my wishful thinking, and instead I …