Christopher Murray Grieve, known by his pen name, Hugh MacDiarmid, was a Scottish poet and cultural activist.
MacDiarmid was instrumental in creating a Scottish version of modernism and was a leading light in the Scottish Renaissance of the 20th century. Unusually for a first generation modernist, he was a communist; unusually for a communist, he was a committed Scottish nationalist. He wrote in English and literary Scots (sometimes referred to as Lallans).