With ``Unforgiven,`` Clint Eastwood has created an adult Western that can stand with the great accomplishments of the genre`s golden age-John Ford`s ``The Searchers,`` Howard Hawks` ``Rio Bravo,`` Anthony Mann`s ``Bend of the River,`` Budd Boetticher`s ``The Tall T.`` This dark, melancholic film is a reminder-never more necessary than now-of what the American cinema is capable of, in the way of expressing a mature, morally complex and challenging view of the world.