The EAC came into life in 1967 until its collapse in 1977 . The founding member states and then partner states were Kenya, Tanzania and Uganda.

Among many reasons that led to the collapse of the initial EAC in 1977 before its revival in 1999 then oficially 7th July, 2000 were as follows:

1.The disparities in economic paths. Tanzania practiced radical socialism led by Nyerere under Ujamaa policy while Kenya leaned more on Capitalism and was pro-western.
2.Disproportional sharing of benefits. Kenya was the most industrial and its manufactured goods flooded Uganda and Tanzania's market. They grew resentful towards Kenya.
3.The rise of Idi Amin in Uganda. General Idi Amin ovethrown the then president Milton Obote vide a military coup. Obote was Nyerere's close friend, Nyerere refused to sit at any diplomatic table with Amin.

Let us now look at the 1st point. Kenya and Tanzania both claimed to practice socialism. Kenya's African Socialism under Tom Mboya's 1965 Sessional paper was more pragmatic and allowed for private development. It also allowed for foreign investment. This was controversial and prominent leaders like Jaramogi Odinga viewed it as capitalism cloaked in "African Socialism."
On the other hand Tanzania practiced radical state led socialism. She completely cut ties with foreigners. There were farming villages and no private ownership of land. Tanzania did not like the Kenya's socialism which was executed as capitalism. This led to hatred and eventually one of the reasons that occassioned the collapse of EAC.
WHAT IS YOUR OPINION ON TOM MBOYA'S AFRICAN SOCIALISM VIS-A-VIS NYERERE'S UJAMAA POLICY****?