In an exclusive interview with David Martin for our magazine, Zambian president Kenneth Kaunda outlined his approach to foreign policy and political philosophy. In this extract Kaunda, who ruled Zambia from its independence in 1964 until 1991, also discusses why he imposed a one-party state.

David Martin: [Ian] Smith said he wanted an assurance from you that you would no longer support the Zimbabwe liberation movements. What is your reply to this?