The Bond books were written in post-war Britain, when the country was still an imperial power. As the series progressed, the British Empire was in decline; journalist William Cook observed that "Bond pandered to Britain's inflated and increasingly insecure self-image, flattering us with the fantasy that Britannia could still punch above her weight." This decline of British power was referred to in several of the novels; in "From Russia, with Love", it manifested itself in Bond's conversations with Darko Kerim, when Bond admits that in England, "we don't show teeth any more—only gums." The theme is strongest in one of the later books of the series, the 1964 novel "You Only Live Twice", in conversations between Bond and the head of Japan's secret intelligence service, Tiger Tanaka. Fleming was acutely aware of the loss of British prestige in the 1950s and early 60s, particularly during the Indonesia–Malaysia confrontation, when he had Tanaka accuse Britain of throwing away the empire "with both hands".