Why did the United Nations call on countries not to recognize Rhodesia's white-minority government?

The United Nations refused to recognize Rhodesia’s white-minority government primarily because its Unilateral Declaration of Independence (UDI) in 1965 was an illegal act designed to preserve the dominance of the white minority and resist British efforts to grant independence under Black majority rule.123

This stance was rooted in the fundamental principle of self-determination, which became a central goal of the United Nations following World War II. The UN Charter asserts that all peoples have the right to freely determine their political status and form of government. By establishing a regime that systematically excluded the Black African population from political power, the Rhodesian government violated these core principles of equality and democratic representation.413

Consequently, the UN Security Council imposed mandatory economic sanctions on Rhodesia in 1966 to pressure the regime to end its discriminatory policies and transition to majority rule. The international community’s refusal to grant recognition served as a moral and diplomatic rejection of a state structure built upon the oppression of its majority population.231