Accumulation of data from botany, archeology and genetics yields an improved picture of the beginnings and early spread of wheat agriculture, as well as of the evolution of the species involved. The "Agricultural Revolution" is subdivided into three stages : the Agrotechnical Revolution, the Domestication Revolution and the Expansion of Agriculture. Hulled wheats were the mainstay of plant husbandry in Neolithic Europe, a continent which was then somewhat warmer than it is today. The intensive spread of cereal agriculture was an important factor that changed the aboriginal woody landscape of Europe to today's summer-yellow fields. A new phylogenetic scheme traces the history of domesticated wheats, suggesting the time and locale of each evolutionary step and reveals that development of these domesticated plants was rapid.