In 1800, Germany's social structure was poorly suited to entrepreneurship or economic development. Domination by France during the French Revolution (1790s to 1815), however, produced important institutional reforms, that included the abolition of feudal restrictions on the sale of large landed estates, the reduction of the power of the guilds in the cities, and the introduction of a new, more efficient commercial law. The idea, that these reforms were beneficial for Industrialization has been contested. Nevertheless, traditionalism remained strong in the many small principalities. Until 1850, the guilds, the landed aristocracy, the churches and the government bureaucracies maintained many rules and restrictions that held entrepreneurship in low esteem and given little opportunity to develop. From the 1830s and 1840s, Prussia, Saxony and other states introduced agriculture based on sugar beets, turnips and potatoes, that yielded higher crops, which enabled a surplus rural population to move to industrial areas.