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Chandna's book examines the push and pull factors that influence migration. Push factors, such as poverty, unemployment, and natural disasters, encourage people to leave their place of origin, while pull factors, such as economic opportunities, better living conditions, and social amenities, attract people to a new location. The author highlights that migration has significant impacts on the population distribution, economic development, and social structures of both the sending and receiving countries.

Chandna's book also discusses the concept of population concentration and dispersion. Population concentration refers to the clustering of people in specific areas, such as cities, while population dispersion refers to the scattering of people in rural areas. The author highlights that population concentration is a characteristic of developed countries, where urbanization is high, while population dispersion is more common in developing countries, where rural populations are predominant.