Can economic and diplomatic power replace defence?

Can a country be a diplomatic powerhouse without being a military powerhouse?

Economic and diplomatic influence help, but they remain constrained when a state lacks secure resources, credible defence, or allies able to respond in time.

Economic power can amplify diplomacy, but dependence on an authoritarian supplier can sharply limit freedom of action, as German energy security demonstrates. Australia has the resources to field a capable regional military and reinforce its diplomacy, even if its population is too small for unlimited economic weight. Poland's rearmament reflects a different calculation: national forces must delay an attacker until allies can arrive. Economic interdependence has not made war between advanced states impossible. These examples extend the Ceylon lesson by showing why prosperity and diplomacy still depend on resilient infrastructure, alliances, and defence.