Jim Cullen is chairman of the history department at the Fieldston School in New York and author of "Sensing the Past: Hollywood Stars and Historical Visions" (Oxford University Press).

(CNN) -- If, as many observers believe, Daniel-Day Lewis wins the Academy Award for best actor on Sunday, he will become the first man to win three (Meryl Streep has done this; Maggie Smith might match her if she wins for her turn in Quartet). Such an honor would ratify Day-Lewis' standing not simply as one of the greatest actors of his time, but for all time.

Like Robert De Niro, Day-Lewis is seen as the quintessential method actor, a commitment he has taken to extremes in his well-known penchant for embodying his characters even when the cameras aren't rolling. Day-Lewis also is notable for the extraordinary breadth of roles he has played.

He first came to global attention in 1985 when he appeared simultaneously as the priggish Cecil Vyse in the Merchant-Ivory film adaptation of E.M. Forster's 1907 novel "Room with a View" as well as Johnny, the gay East End punk, in Stephen Frears' brilliantly brash "My Beautiful Launderette."...