The earliest card games were trick-taking games (as evidenced by the rank-and-suit structure) originating from China and spreading westwards during the early part of the second millennium. Michael Dummett noted that these games share various features. They were played without trumps, following suit was not required but only the highest card of the suit led wins, rotation was counter-clockwise, they were plain-trick games, and that the pip cards of one or more suit are in reverse order so that the lower cards beat the higher ones. Two revolutions occurred in European trick-taking games that would lead to the development of ever more sophisticated card games. The first is the invention of trumps (and following suit to contain their power) in the 15th century. The second was bidding in the 17th century.