Gender refers to the social, cultural, and psychological constructs that classify individuals into distinct roles and identities, often differing from biological sex. While based on historical distinctions between masculine and feminine, the concept has expanded to include non-binary and transgender identities, reflecting societal norms and power structures. Authors like the Three Initiates in The Kybalion view gender as a universal principle underlying all phenomena, while R.G.
Latham emphasizes its grammatical origins, and Archibald Henry Sayce links it to early differentiations between male and female. Walter Henry Medhurst further connects gender with the assignment of characteristics such as hardness or luminosity to masculine or feminine categories. These diverse viewpoints highlight gender’s dual nature—as both a universal framework and a socially constructed system—shaped by historical, cultural, and philosophical discussions.