Does culture have an impact on society, and if so, how? The study by Nathan Nunn and Leonard Wantchekon set out to examine the impact of the slave trade, which has left its mark on the African continent and its economy, but which ended some 100 years ago, on the cultural, norm-following, beliefs and values of individuals. Their aim is to explore the reasons that led to the historical disconnect within Africa between local governments or municipalities (politics), between the outlying communities (neighbours) and even within family relations, which may still influence economic development today. Nunn and Wantchekon's hypothesis is based on an earlier study by Nunn, which showed a causal link between the 400-year slave trade and the income conditions of the African population today, looking at the long-term economic effects of the slave trade.