The origins of pale ale are obscure, but the style has always had hops, so it must have been introduced after the early sixteenth century, when hops were first used in England and the term “ale” was used to specify a particular style of fermented malt beverage.
This style was the style of choice for American microbrewers because it was so basic. Pale ale also offers such a range in color, taste, and aroma that brewers felt comfortable when adding their personal touch to the style. However, the distinct American varieties of hops and unique fruity-ester aromas created by top-fermenting “ale” yeast mark American style pale ale as unique. If the United Kingdom can claim Bass Pale Ale as the essential British pale ale, then America can also claim a style defining American pale ale.