# Percy Shelley > Shelley – a poet whom Marx considered ‘one of the advanced guard of socialism’ – not only admired Oswald’s pamphlet but authored the vegetarian essay A Vindication of Natural Diet. There, he made the Platonic argument that ‘devouring an acre at a meal’ led to war, and included the Jennerite insight that disease itself was historical and ‘flowed from unnatural diet’, which included meat > > – [[Half-Earth Socialism]] > He was married to [[Mary Shelley]], the daughter of [[Godwin]] and [[Mary Wollstonecraft]]