The early 20th Century was probably the high tide of global white supremacy - I'm going to call it that because that's how people thought of it - and to be specific, Anglo-Saxon supremacy: The idea that white Anglo-Saxon Protestants were at the top of the world, representing the highest achievement possible for all of humanity, with Darwin's theories being used to prop up this belief.
She was like me in lineaments-- her eyes Her hair, her features, all, to the very tone Even of her voice, they said were like to mine; But soften'd all, and temper'd into beauty; She had the same lone thoughts and wanderings, The quest of hidden knowledge, and a mind To comprehend the universe: nor these Alone, but with them gentler powers than mine, Pity, and smiles, and tears-- which I had not; And tenderness-- but that I had for her; Humility-- and that I never had. Her faults were mine-- her virtues were her own-- I loved her, and destroy'd her!