The Story of the Reimer Twins: A Transgender Experiment

How Dr. John Money failed theory of Nurture Over Nature led to the deaths of the Reimer twins!

In May 2017 the Canadian human rights commission amended the human rights act to incorporate 'gender identity and gender expression under the list of terms that are protected from discrimination. What are the origins of gender identity and where did the concept of gender begin to stray from early dictionary definitions?