How paper money led to the Mongol conquest: money and the collapse of Song China.

AuthorOnge, Peter St.
PositionEssay

The first panacea for a mismanaged nation is inflation of the currency; the second is war. Both bring a temporary prosperity; both bring a permanent ruin. But both are the refuge of political and economic opportunists.

--Ernest Hemingway, "Notes on the Next War"

China's Song dynasty (960-1279) is fascinating for three reasons. First, the Song is one of history's wealthiest Golden Ages, inventing military gunpowder, movable print, industrial textiles, windmills, and canal-faring paddleboats--innovations fueled by the mass production and commercialization of rice. Second, as a powerful empire succumbing to the Mongols, the Song added to the resources the Mongols subsequently deployed to conquer most of Eurasia. Third, among the most significant inventions credited to the era is one many of us carry every day: paper money.

The Song is also fascinating because of its fate: it collapsed not once, but twice. Both collapses occurred in a strikingly similar pattern: propagation of populist and dirigiste policies that burdened the private sector, followed closely by inflationary deficit financing, hyperinflation, war in alliance with inferior neighbors, and, finally, conquest by these seemingly far less powerful allies. That such a similar pattern occurred twice, on such similar timelines, begs a search for underlying economic patterns.

Generalissimo Chiang Kai-Shek once compared the invading Japanese to a disease of the skin but the Communists to a disease of the heart (Hu 2006). In this essay, I argue that China's Song dynasty was destroyed not by the skin disease of military misadventure but rather by the heart disease of an economically predatory government. I trace out the critical role played by one of the most significant technological developments of the era: fiat currency.

I argue that because inflationary deficit finance allowed the Song to obtain revenue regardless of the private sector's well-being, in a process analogous to the natural-resource curse (Garaibeh 1987; Luciani 1987; Chaudhry 1994; Karl 1997; Ascher 1999; Moore 2001, 2004; Sachs and Warner 2001) and to the "aid curse" (Leeson 2008), these policies weakened the natural symbiosis between public administration and the private sector. In effect, by papering over the short-term fiscal harm of economically destructive policies, fiat money creation allowed those policies to survive long enough to "metastasize." This greater freedom of bureaucratic action allowed the entrenchment of policies that harassed the private economy via attacks on the property rights on which it depended (see Acemoglu, Johnson, Robinson 2001, 1369, for a survey of literature linking security of property rights and economic growth), while permitting increased fiscal costs that became debilitating during episodes of monetary retrenchment.

This fiat-money-enabled economic stagnation and fiscal deadweight then led to the proximate causes of the Song's decline: high inflation, widespread corruption, a series of aggressive wars with neighbors, and alienation of local landlords, merchants, and producers. Combined, these results facilitated what would otherwise have been an unlikely conquest by much smaller neighbors.

Explanations of the Song collapses today tend to focus on noneconomic and typically proximate causes: military reversals (Woolf 2008), gradual resource depletion (Pomeranz 2000), overpopulation (Sng 2010), and even cultural aggregates such as general attitudes toward innovation (Mokyr 1990; Landes 2006). A key challenge to such arguments, beyond the military mismatch, is that both declines saw sharp inflections surrounding economic policy events, identifiable to the decade or even the year--too sharp for population pressures, gradual resource depletion, or especially cultural views of innovation. Kent Deng sums up the modern view: "The Song paradox of advanced industry and commerce coinciding with pathetic national defense has never failed to provoke debate" (2013, 4).

Indeed, the military, production, and economic policy evidence points to two very specific inflection points in the collapses. Both occurred several decades before the actual conquests, and both hinge on the promotion of a package of populist and dirigiste policies formulated by Prime Minister Wang Anshi (in office 1069-76), who even today is revered as a major intellectual influence on Chinese political philosophy. The first inflection began a few short years after Wang's rise to power in 1069, and the second occurred several years after the installation of the inflationist emperor Xiaozong in 1162.

With this essay, I hope to shift scholarly emphasis from the proximate symptoms of the two Song collapses toward the underlying problems of the Song economy, problems that in turn crippled the Song administration. This shift in emphasis matters for two reasons. First, rather than focusing on particular decisions or personalities-- whether General X chose the right terrain in battle Y or what money-token was printed in Sichuan in 1107--it places blame squarely on the fundamental economic dynamics. This shift is also important because it suggests a greater generalizability of the warnings we should take from the collapse of the Song. If the Song collapses were random mistakes, we can draw few lessons beyond "Don't use General X to fight Mongols in terrain Y." If, however, the Song collapses illustrate a fundamental process whereby the ability to grow the money supply permits economically destructive polices to metastasize, then we might pay more attention to similar processes unfolding now.

Indeed, since the collapse of the Bretton Woods arrangement in 1973, all of the world's major economies have begun down the Song path: fiat-currency regimes have enabled institutionalized deficit financing and permanent inflation and have indeed been accompanied by rising regulatory burdens, rising rates of taxation, and slowing rates of economic growth, today termed "secular stagnation" (Baldwin and Teullings 2014). We have even seen in the case of the United States a return to the Wang- style "ever war" as an assembly line of "preemptive" military interventions grinds on.

Overview of the Song Dynasty

The Song (Sung) dynasty was established in 960 and ended with the death of its last emperor, Huaizong, in 1279. Song China has a strong claim to be the first industrialized society in history (Miyakawa 1955; Sng 2010), with modern legal, regulatory, tax, and money institutions. The first century of the dynasty saw very strong economic growth; output of iron rose fivefold, while output of bronze, tin, and lead rose twenty- to fiftyfold, velocities of output growth rare before the Industrial Revolution (Du 1998). The arts and living standards dramatically improved (Maddison 1998, 19-39); population doubled in a century (Smil 1993); and a thriving consumer society flourished (Miyakawa 1955). In a strikingly modern-sounding complaint, one contemporary observer complained that young people couldn't cook anymore because everybody was buying takeout (Gernet 1962).

What should unsettle the historian is that despite this unprecedented economic strength and the technological advances that accompanied this strength-- gunpowder (including exploding iron shells), movable type, textile machinery, new seed varieties, paddle-wheel ships, modern windmills--the dynasty was ultimately conquered twice by bands of nomads with a fifty-to-one disadvantage in numbers. Many historians have focused on military factors, but an analogy might help to retrain that focus: if the nineteenth-century United States had been seized and ruled by, say, the Sioux, we might look less to Sitting Bull's horseback skills or to General Custer's order of battle and more to institutional reasons why the governing regime had become so brittle that it was easily broken.

Song Timelines

The fortunes of the Song dynasty followed an M-shaped pattern, with a century separating two dramatic rises and a dramatic collapse after each rise. Three distinct timelines are considered here: military, productivity, and monetary. Interactions among the three can then be discussed in the context of the observed Song inflection points.

Military Timeline

The Song dynasty was established by unifying several small kingdoms that had emerged after a military coup deposed the previous Tang dynasty. Patricia Buckley Ebrey describes the fifty-year interim between dynasties as prosperous; the Tang-era property institutions were preserved, and the small kingdoms coexisted largely peacefully, with the population rising during both the Tang and interim periods. Ebrey writes, "[P]olitical fragmentation in the south did not impair the economy there; on the contrary rulers of the regional states, eager to expand their tax bases successfully promoted trade" (1996, 136). The principle Tang economic innovation had been abandonment of government title of large landholdings in favor of privatized holdings (Golas 1980, 299).

In the first one hundred years of the Song dynasty, economic output, standards of living, and population rose dramatically, leading to a recognizably modern economy that featured a large urbanized middle class, a steady stream of new innovations, and an increasingly complex economy (Miyakawa 1955). Military expenditures were robust, tripling between 979 and 1041 (Ebrey 1996, 138).

By the 1080s, this prosperity had begun to taper, and thereafter it began to fall at an accelerating rate. Contemporary observers laid blame for die decline on the "disaster" of socialist reformer Wang Anshi (von Glahn 2005, 71), who seized the commanding heights of production, issued widespread price-and-wage controls, and established state pensions and direct provision of credit (Nourse 1942). Wang's policies followed a philosophy that "[t]he state should take the entire management of commerce, industry, and agriculture into its own hands, with a view to succoring the working classes and...

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