Although corruption was a common feature of his administration, he gained international respect for his role as a spokesman for African affairs and as a popular arbitrator in conflicts.
In 1946, while working as the headmaster of a school in Niger’s capital city of Niamey, he became one of the founders of the Nigerien Progressive Party (PPN), a regional branch of the African Democratic Rally (RDA).
Organizing a powerful coalition of Hausa, Fula, and (most prominently) Djerma leaders, including chiefs and traditionalists, in support of Niger’s independence referendum, Diori gained French favor.
Domestically, however, his administration was rife with corruption, and the government was unable to implement much-needed reforms or to alleviate the widespread famine brought on by the Sahelian drought of the early 1970s.
Increasingly criticized at home for his negligence in domestic matters, Diori put down a coup in December 1963, which occurred concurrently with a border dispute with the Republic of Dahomey.
However, his relationship with France suffered when his government voiced dissatisfaction with the level of investment in uranium production when Georges Pompidou visited Niger in 1972.
Widespread civil disorder followed allegations that some government ministers were misappropriating stocks of food aid and accused Diori of consolidating power.