"Nietzsche contra Wagner" is a critical essay by Friedrich Nietzsche, composed of recycled passages from his past works. It was written in his last year of lucidity (1888–1889), but was not published until 1895, six years after his mental collapse. Nietzsche describes in this short work why he parted ways with his one-time idol and friend, Richard Wagner. Nietzsche attacks Wagner's views, expressing disappointment and frustration in Wagner's life choices (such as his conversion to Christianity, perceived as a sign of weakness). Nietzsche evaluates Wagner's philosophy on tonality, music and art; he admires Wagner's power to emote and express himself, but largely disdains what Nietzsche calls his religious biases.