Final answer:
Sub-Saharan Africa has received the least inward investment due to a confluence of political instability, armed conflicts, and economic volatility, compounded by the lasting impacts of colonialism.
Step-by-step explanation:
The region that has typically received the smallest amount of inward investment due to political unrest, armed conflict, and frequent changes in economic policy is Sub-Saharan Africa. This region is home to many of the world's poorest countries, where poverty thrives both in rural areas and urban slums. A history of bitter civil wars and current violent conflicts in some areas, along with political instability, and the diversity in human geography due to a variety of ethnic groups, languages, and religions, create significant challenges. Additionally, the legacy of colonialism and imperialism has left a lasting impact on the governance and economic conditions of the countries within Sub-Saharan Africa, often resulting in high levels of government corruption and poorly developed industries due to borders drawn based not on ethnic or cultural lines but rather imperial convenience, exacerbating ethnic conflicts.