The Igbo pursuit of enrichment in the post-colonial context continued in the pre-colonial and colonial tradition of the pursuit of community enrichment. A large part of Nigeria's post-colonial capitalist economy relied on the exportation of agricultural products. Because of the poor quality of soil in the predominately Igbo southeastern region, many Igbo people began to migrate into the urban centers of other regions. Due to the Igbo people's relatively high levels of education, they were able to take jobs as clerks, traders, and shopkeepers and eventually rise to the ranks of professionals, journalists, and government employees. The affluence of the migrant Igbo population by way of their employment in northern cities by inspired resentment within the resident population following the events of the 1966 military coup. Many of these Igbo individuals were targeted during the 1966 anti-Igbo pogrom which eventually contributed to the onset of the war.