Life expectancy and income among the first countries to begin health transitions -- Which countries should be studied? -- A colonizer and the country colonized : Japan and Korea -- Very low income is not a barrier : Sri Lanka -- Two neighbors : Panama and Costa Rica -- Capitalism and communism, dictatorship and democracy : Cuba and Jamaica -- The Soviet Union and China -- Oil-rich lands -- Income inequality and health in Mexico -- Fecal disease, malaria, and tuberculosis.