The conquest of the empire by the Crusaders in 1204, and the subsequent division of the Byzantine territories affected the agrarian economy as it did other aspects of economic organization, and economic life. These territories split among small Greek and Latin states, lost much of the cohesion they may have had: the Byzantine state could not function as a unifying force, and, in the 13th century, there was very little to replace it. The 13th century is the last period, during which one may speak of significant land clearance, that is, the act of bringing previously uncultivated land into cultivation. But the progressive impoverishment of the peasantry, entailed the decline of a certain aggregate demand, and resulted in a concentration of resources in the hands of large landowners, who must have had considerable surpluses.