The interconnectedness of economies, cultures, and societies means that instability and conflict in one part of the world can easily spread to other regions, creating a ripple effect that can undermine peace and stability on a global scale. The rise of mass migration, climate change, and pandemics also pose new challenges to achieving peace, as these issues can exacerbate existing conflicts and create new sources of tension. In conclusion, the absence of peace in the world is due to a complex interplay of external and internal factors that create a volatile and unstable global environment.