Fate and Free Will is the title given to a text written by J.R.R. Tolkien sometime after January 1968. The fragment was edited by Carl F. Hostetter and published in Tolkien Studies: Volume 6 (2009, pp. 183–8), and later in The Nature of Middle-earth (2021, Part 2, chapter XI).
The essay (or rather, notes) consists of a philosophical discussion of Eldarin thoughts on the nature and relations of fate, free will and the created world. These were presented in the context of a linguistic discussion of Elvish phonology (of the two Quenya words ambar 'world' and umbar 'fate').