<human>:  Describe the concept of non-binary gender and its importance in civil rights discourse.
<bot>: Non-binary gender is a term used to refer to gender identities outside of the traditional male and female gender binary. Non-binary individuals may identify as one or more genders, or may identify as having no gender at all. This concept is closely linked to the idea of gender fluidity, that gender is not a fixed state and can change over time or from situation to situation. Non-binary gender is important in civil rights discourse, as it expands and challenges existing understandings of gender and brings visibility to gender identities that are often ignored or marginalized. It is also essential in recognizing the intersectionality of gender and other identities, such as race and sexual orientation, in the broader fight for civil rights and equality.