Because they were different from the other city-states, and they had a different government system.
Kept poor people from serving the state. Imitated the laws of its neighbors. Treated all its people fairly regardless of class.
answer: Biography of Dr Kwame nkrumah
Kwame Nkrumah (1909-1972) was the first president of Ghana. Though he effected Ghana's independence and for a decade was Africa's foremost spokesman, his vainglory and dictatorial methods brought about his downfall in 1966, with him a discredited and tragic figure in African nationalism.
The career of Kwame Nkrumah must be seen in the context of the Africa of his period, which sought a dynamic leader but lacked the structures that would make possible the common goal of continental unity. Ghana's and Africa's very inadequacies initially made them insensitive to Nkrumah's failings, conspicuous among which was the ever-widening gap between his rhetoric, which called for a socialist revolution, and his practice, which accommodated itself to the worst aspects of tribal and capitalist traditions.
Answer:
they could not defend themselves against stronger groups.
