Who was Houston Stewart chamberlain?

Houston Stewart Chamberlain (1855-1927) was a British philosopher and writer known for his influential works on race and culture. He is best known for his book "The Foundations of the Nineteenth Century," which promoted ideas of Aryan superiority and contributed to the intellectual underpinnings of racial nationalism in Germany. Chamberlain's ideas were later appropriated by the Nazi regime, making him a controversial figure in the history of racial thought. He spent much of his life in Germany, marrying Richard Wagner's daughter, and became a prominent advocate for Wagner's artistic and cultural vision.