This economic development demanded more people, and as the population had been greatly diminished by the wars of conquest in Europe during the sixteenth, seventeenth and eighteenth centuries, and by the expeditions of discovery beyond the seas, the more advanced governments found it necessary to facilitate marriage and the right of settling. Spain, that by its imperialistic policy had become greatly depopulated, was obliged as early as 1623 to pass a law exempting from taxes for a number of years all persons who became married between the ages of 18 and 25. Poor persons were even given a dowry from public funds. Parents who had six or more male children were entirely exempt from taxes. Spain also encouraged immigration and colonization. King Louis XIV. of France, who had decimated his people by his numerous wars, found it necessary to counteract this devastation by exempting from taxes for from four to five years all taxpayers, who constituted a great majority of the population, if they became married before the twentieth or twenty-first year of age. Complete exemption from taxes was, furthermore, guaranteed to all who had ten living children, provided that none of these had become a priest, a monk or a nun. Noblemen having the same number of children, provided that none of them had become priests, monks or nuns, received an annual pension of from 1,000 to 2,000 livres. Citizens not subject to taxation under the same conditions received one-half of this amount. Marshal Maurice of Saxony even advised Louis XV. not to permit marriages to be contracted for a longer period than five years.