At the close of the Napoleonic Wars in 1815 Prussia was an industrial backwater. By the mid 1860's Prussia had achieved a considerable degree of industrialization. In a sense, her economy had “taken off.” The turning point dates from around 1840 and was closely related to railroad building. Before 1840 industrial investment grew haltingly. The combination of inadequate markets and the lack of supporting enterprise made industrial investment—particularly in those lines in which Europe's industrial leader, England, was already specialized—too risky and/or its anticipated yields too low for most potential investors, who preferred to invest in real estate, commerce, and in foreign government bonds. As leading Prussian entrepreneurs argued, the country's industrial development required public investment in river improvements, roads, canals, railroads, banks, and other facilities which would generate external economies and make private investment, for example in metalworking enterprise, more profitable. Theoretically, such public investment could have been financed by curtailing other governmental expenditures, by taxing unproductive consumption, and/or by borrowing. The technical proficiency required by such investments was either domestically available or could be readily borrowed from abroad. Even Prussian political economy, through its interpretation of the Classicists, reflected these conditions and called for state assistance. The will, the means, and a rationale for a program of public investment were at hand: one could truly speak of an abundance of “advantages of backwardness” in Prussia after 1815.