Welcome to the Anzac long weekend (sort of). This column is brought to you by your friendly economists, who want to get one thing straight: whatever their causes, wars are usually won by the side with the most economic resources.

This is just one of the many fascinating things you learn from a new book, The Shortest History of Economics, written by Dr Andrew Leigh, former economics professor turned minister in the Albanese government. (The book’s name is misleading. It’s really the shortest account of the part the economy has played in the world’s history. Well worth a read.)

Credit: Matt Davidson

Leigh says the first industrial-scale war following the Industrial Revolution was America’s Civil War during the first half of the 1860s.

“With the use of mass-produced weapons, railroads, steamships and telegraphs, the Civil War was industrial in its scale, and in its carnage,” he says. More than 600,000 combatants – one in five soldiers – lost their lives.

A striking thing about that war was the imbalance of resources between the two sides, strong support for the saying that God is usually on the side with the bigger battalions.

At the outset, the North had a population of 21 million – more than twice the South’s. The South was primarily an agricultural economy, with the North producing 90 per cent of the country’s manufactured goods, including 97 per cent of its firearms.

What’s surprising is that the South held out as long as it did. The war was prolonged by the North’s poor military tactics.

From an economic perspective, wars are often financed by printing money, with ultimate inflationary consequences. The South used this to fund 60 per cent of its costs, whereas the North needed only 13 per cent.

To economists, a significant effect of World War I was that it brought a hasty end to the world’s first experience of globalisation, with greatly increased trade and migration between Europe and the “new world”, fostered by the advent of steel-hulled steamships and the telegraph, and the absence boring things like passports and visas.