I recently came across an interview with Noam Chomsky in which he made an intriguing claim. He mentioned that the grammatical rule distinguishing the use of "shall" for the first person and "will" for all other persons when expressing the future tense was invented by a specific 17th-century grammarian, whose name he could not recall. Chomsky used this example to illustrate how some linguistic rules are entirely artificial constructs, imposed by individuals rather than naturally evolving within the language.
While researching, I discovered that John Wallis might have been the grammarian who codified this rule in his works. This prescriptive rule has intrigued me, particularly because I recall the difficulty of learning and correctly applying it during my early school years when that topic was at hand.
However, I have been unable to find additional sources confirming that this rule was indeed the creation of a single individual and subsequently popularized despite its lack of natural use among English speakers. While Chomsky is undoubtedly a seminal figure in linguistics, I find it essential to critically evaluate his assertions, especially because many of them are controversial among the broader linguistic community.
Could anyone provide more insight into this matter? Was the distinction between "shall" and "will" purely an artificial imposition by one grammarian, later entrenched in educational curricula despite its practical obsolescence? Alternatively, did this concept have natural usage origins before becoming codified and later falling out of common use?