Internationalism No. 88, June 2026 Page 3 From the series European news As Henry Kissinger wrote in his book Leadership (Penguin, 2022), in the British political system, parties are "rigorously institutionalized": "An electoral victory functions first to empower a party in parliament and, as a consequence of that, to install a new premier". Unlike presidential systems such as the American one, "the British system elevates members of the cabinet to the highest echelons of their party". The prime minister's authority "rests primarily on the maintenance of party discipline" because "the dissent of an influential clique, or the machinations of a single magnetic personality, can limit the premier's ability to pursue desired political objectives". "In extraordinary circumstances", warns Kissinger, ...