https://amgreatness.com/2018/12/25/2000-a
Gunnar Heinsohn is an emeritus professor at the University of Bremen. Since 2010, he has taught war demography at the NATO Defense College (NDC) in Rome.
Proclaim victory and pull out!
On December 19, Donald Trump tweeted his own version of this classic military maxim as the president announced the withdrawal of America’s 2,000 soldiers from the war against the ISIS caliphate in Syria.
Allies reacted with shock. Enemies mocked and gloated. Neither reaction should come as a surprise.
The president’s defenders emphasize that America has nothing to show for the $7 trillion it has spent on this war. The United States, they say, has much greater concerns at home and in East Asia. Few analysts, regardless of how they feel about America’s withdrawal from Syria, understand why such conflicts drag on and on, despite enormous losses. Historians and journalists rarely examine the demographic data that explain why deadly wars can last for decades or centuries.
Even the killing ground of Europe from 1500 to 1945 escapes their attention. And when it comes to Syria, they are utterly clueless about the link between rapid demographic growth and the long and bloody wars that have devastated this region. Explosive population growth results in explosions on the battlefield.
Between 1900 and 2015, Islam’s global population increased by a factor of nine, from 200 million to 1.8 billion people. Christianity, though still the largest religion worldwide, only quadrupled (from 560 million to 2.3 billion). Since 1950, Islam has added nearly 1.4 billion people to its fold, despite the fact that Iran, Lebanon, Tunisia, and Turkey—which together have 180 million inhabitants—are now in a post-growth phase (defined as fewer than two children per woman). This lower birth rate also applies to the approximately 20 million citizens in the rich sheikdoms between Bahrain and Kuwait.
But nine Muslim countries belong to the 68 nations of the world that have what I call a “war index” that is higher than 3—that is, they have 3,000 or more youths between the ages of 15 and 19 for every 1,000 men aged 55 to 59 who are close to retirement. For four Islamic countries outside the Middle East—Afghanistan (5.99; 36 million), Sudan (4.65; 42 million), Mauritania (4.17; 5 million) and Pakistan (3.39; 200 million)—the war index is even higher.