singapore found dean prominent singapore school say monday step four months stir heat debate city-state comment small countries like singapore must always behave like small state kishore mahbubani long-time diplomat wealthy city-state former envoy unite nations say write board lee kuan yew school public policy say would step dean end year announcement follow high-profile expulsion government professor school china-born u.s. citizen accuse agent influence foreign country statement school govern board mahbubani cite double heart bypass operation last year say want focus new career involve time spend read reflection write realize time come take fresh look achieve next decade enter 70s say kishore 69 serve 13 years dean kishore statement refer controversy fuel column july qatar experience conflict arab neighbor offer big lessons small countries piece title qatar big lessons small country kishore warn singapore could face fate gulf state believe could act middle power exercise influence beyond border sit mound money would like emphasize strongly qatar episode hold many lessons singapore write singapore straits time newspaper first lesson say small state must always behave like small state public criticism perceive admonishments government rare singapore one rich politically stable countries world comment draw sharp rebuke singapore political leaders fellow former foreign service officials flaw intellectually questionable veteran diplomat bilahari kausikan call muddle mendacious indeed dangerous mahbubani could reach comment spokeswoman national university singapore lee kuan yew school autonomous postgraduate school say professor kishore mahbubani decision retire unrelated article mention school name modern singapore found father singapore academic warn peril small countries step