The thesis examines political and economic transitions in Sub-Saharan Africa (SSA) and particularly in post-communist Ethiopia and Angola between 1989-2019 by applying the interpretative scheme of transition theory. The research question investigated how the economic liberalization of centrally planned political systems affects their political liberalization and vice versa. The main hypothesis attempted to answer whether transition theory can apply as an interpretative model in order to explain post-communist developments in the SSA context. Characteristic noteworthy country examples, which have experienced communism (...) for an extended period and are now under a hybrid developmental state form - with their impressive economic development being driven mainly by the state - are Ethiopia and Angola. Ethiopia and Angola belonged among the fastest-growing economies in the world among China, India and East Asian countries with astonishing high growth rates for extended periods. In turn, their political transition presented signs of liberalization. Yet, they seem to follow the stagnated path of developmental states and hybrid regimes. Ιn order to examine the political and socio-economic parameters of these transformations, the methodology uses also a combination of qualitative and quantitative research data through a twofold comparative approach. From the political perspective two similar political systems are compared. From the economic perspective, we compare a non-resource-rich economy such as Ethiopia with a resource-rich economy such as Angola. The degree of influence of socio-economic interventions by major external actors such as China, US and the EU to democratic consolidation, and vice versa, is examined as well as the repercussions of radical and gradual reforms. The findings of the study suggest that rapid economic transitions along with gradual political reforms in Ethiopia, Angola - and broadly in SSA - inevitably cause delays in socio-economic developments such as employment, inclusiveness and poverty alleviation. Structural external transition drivers in SSA such as debt, structural adjustment programs, subsidies, humanitarian aid and trade deficits seem to hamper its economic transitions than to facilitate its progress and non-dependency. These drivers lead to a vicious circle in most of the empirical examples of SSA. The strong hybrid developmental states of Ethiopia and Angola – despite their democratic progress - present more similarities to the developmental states of China or rest East Asia than to the Central Eastern European countries. In a certain degree, there are similarities also with cases of the Commonwealth of Independent States (CIS), which are still under Russia’s significant influence. The most context-specific parameters though, which concern Sub-Saharan Africa and diversify the states of Ethiopia and Angola from the existing interpretative scheme of transition theory are their high ethnic diversity and economic dependence from their external partners as well as their sui generis leadership. These parameters pose significant constraints to the diverse ethnic groups in their struggle for power and for their access to the natural resources. (shrink)