We are welcomed into a society and culture that has strict guidelines to fit us into it and label our future. We grow and educate ourselves until we reach maturity, and then make decisions for ourselves. And this includes our gender identity and sexual preferences. From binarism as a pillar of the identity of the human species, Oscar Borja reflects in this book: Does the ability to identify with a gender other than the one assigned at birth represent an evolution of nature? Does nature really allow us to explore possibilities beyond binarism? If the existence of genders other than those contemplated in the binarism are the result of an error of nature? No matter how varied the answers may be, the reality is that gender identity is undeniably part of the Nature of the human being. Whether we agree or not, the call is to respect and empathize, challenging discrimination and hatred, advocating for a world where diversity of gender identity is not a reason for division, but for understanding and acceptance.