> But there have been no wars between major powers in the last 80 years. Maybe people in power have realized that all-out wars are no longer productive.

People talked like that before WW I. There hasn't been a major war in Europe since 1870 almost half a century and trade is such a large war would bankrupt all the major powers and so would never happen. The Great Illusion was published in 1909 and was positively received at the time:

> In The Great Illusion, Angell's primary thesis was, in the words of historian James Joll, that "the economic cost of war was so great that no one could possibly hope to gain by starting a war the consequences of which would be so disastrous."[4][5] For that reason, a general European war was very unlikely to start, and if it did, it would not last long.[6] He argued that war was economically and socially irrational[7] and that war between industrial countries was futile because conquest did not pay.