During his administration, the Akosombo Dam was completed.
J. H. Mensah organized this leader's Work and Happiness Plan. He hosted the first meeting of the World Without the Bomb group and was known in his country as "Osagyefo". This man served as General Secretary of the UGCC, an organization set up by his compatriot J. B. Danquah; he'd later pursue "positive action" with the (*) Convention People's Party. This man's government fell during his 1966 visit to Beijing, allowing Joseph Arthur Ankrah to take power. During his administration, the Akosombo Dam was completed. For 10 points, name this founder of the Organization of African Unity and first prime minister of Ghana.
J. H. Mensah organized this leader's Work and Happiness Plan.
Kwame Nkrumah [prompt on "Osagyefo" before mentioned]