The kidnapping and export of so many millions, particularly men, impacted family life, and in many of the areas from which people were stolen, there tended to be majority female populations. The European use of chattel slavery also led to an increase in intertribal warfare, and over time, the dissolutionof once powerful kingdoms, especially those located along the coast. However, despite the export of so many Africans, the population did not decrease on the continent, as the introduction of new food crops from the Americas helped stabilize the population.