Mzee Mwanakijiji, here is an excerp I have taken from wikipedia on Oscar Kabmona,
Oscar Kambona - Wikipedia, the free encyclopedia. Kambona advised him to test the ' Ujamaa ' system in a small scale but Mwalimu refused and the results are evident today?..
" After Nyerere came out of seclusion, he publicly thanked Oscar Kambona, whom he called "my colleague," for defusing a potentially dangerous situation.
In fact, when the soldiers remained defiant, it was Oscar Kambona who persuaded Nyerere to seek immediate assistance from the former colonial power, Britain, to suppress the mutiny.
The two leaders had been close political allies and personal friends since the days of the independence struggle when they were the main leaders of the independence movement. In fact, when Kambona got married to a former Miss Tanganyika at a cathedral in London, Nyerere was his best man.
But
the two leaders started drifting apart a few years after independence. The
first rift occurred in 1964 during the army mutiny, and then in 1965 when Tanzania officially became a one-party state.
As a cabinet member, Oscar Kambona supported the transition to a one-party state but did so reluctantly, only as a team player.
He was opposed to the change because he said there was no mechanism guaranteeing change of government by constitutional means in a country dominated by one party. He also contended that there were no constitutional safeguards to make sure that the country did not drift into dictatorship.
The next split with Nyerere came in February 1967 when Tanzania adopted the
Arusha Declaration, an economic and political blueprint for the transformation of Tanzania into a socialist state.
Kambona was opposed to this fundamental change and argued that
the government should first launch a pilot scheme to see if the policy was going to work on a national scale......."