The book’s third part will concentrate on terrorism, which is causing conflict, violence, and suffering for a large number of people globally. Terrorism-related deaths and international migration have a lasting effect on the social, economic, and psychological spheres. The concept of terrorism and its risk factors—social, economic, religious, personal, and cultural—are the main topics of this chapter. Different types of terrorism such as narco-terrorism, cyberterrorism, and bioterrorism were explained in this chapter. Numerous socioeconomic causes have been identified as the causes of terrorism, including poverty, social inequality, and urbanisation. Political factors, whether external or internal, are some of the main drivers of terrorism. Over the past 20 years, a significant development in terrorism has been the rise of groups that justify their actions through religious beliefs. The causes of terrorism are examined from several angles including psychological perspectives too. The impact of terrorism on social, economic, and psychological aspects costs a lot, in addition to the loss of life, and it will not help humanity. The effects of terrorism on social, economic, and psychological facets will be thoroughly explained.