In their 2022 book Sinostan, Raffaello Pantucci and Alexandros Petersen saw Central Asia as China’s “inadvertent empire”. If that is true – and the five-country region embracing Kazakhstan, Uzbekistan, Kyrgyzstan, Turkmenistan and Tajikistan (informally called the C5) certainly sits at the heart of China’s Belt and Road Initiative – then Beijing could not have chosen a less noticed corner of the world atlas. Unnoticed, perhaps, by almost everyone except Halford Mackinder, who in 1904 described...