Abstract: Based on the premise that perception operates either as a catalyst or a constraint for a hegemonic war, this study examines ‘national perceptions’ (i.e. how the citizens of the two states view each other) and ‘official views’ (i.e. how the two governments perceive each other) between the US and China of the post-Cold War period. As for the national views, (1) American perceptions of China have generally become more negative than Chinese perceptions of America; (2) little congruence is found between the two powers on key values and norms; and (3) perceptions are generally getting far ahead of the realities. As for the official views, formal documents do not fully reveal their real state of minds. Diplomatic courtesy and strategic self-esteem runs through them. Yet, America’s strategic concern and growing will to manage China from a position of strength is increasingly more discernible. From the Chinese documents, on the other hand, signs of inferiority have gradually disappeared. In sum, perceptions between the two are working more as a catalyst for strategic competition than a constraint on it. Full text available here.