External debt refers to the total liabilities a country owes to foreign creditors, including governments, corporations, and individuals, and may be expressed in domestic or foreign currency. This concept encompasses obligations to private banks, international organizations such as the IMF, and foreign governments, serving as a key indicator of economic vulnerability. Historically, scholars such as John S. Keltie and William Playfair examined its dual role, noting how external debt can both promote trade and trigger crises if poorly managed.
The 1911 Encyclopædia Britannica identified external debt as a crucial element of national finance, while U.S. presidential speeches emphasized its risks, such as reliance on foreign lenders. Meanwhile, Playfair contended that debt, when properly balanced, could advantage trading nations. These differing viewpoints highlight how external debt continues to be a central yet delicate aspect of global economic policy.