Global Population Distribution and Migration Dynamics

Global Population Concentrations

East and South Asia: This region contains over half of the world's population. Europe: Especially central regions, accounts for more than 10% of the global population. The Northwest and U.S. Coasts: This area is highly populous, with approximately 300 million inhabitants. Minor Spotlights: These include the Gulf of Guinea, the Nile Valley, and Central Mexico.

Migration: Definitions and Causes

Migration is defined as the movement of a population that implies a change of place of residence.

• Emigration: The transfer of a population from one place to another. A person who leaves their place of residence is an emigrant.
• Immigration: The arrival of a population from another territory. A person who comes from the outside to a new place is called an immigrant.

Causes: Most migrations are due to economic reasons, though many people also emigrate for political causes.

Types of Migration

According to the character or nature of the movement, there are differences between forced migration (unwanted) and voluntary migration. Depending on the duration of the travel, migration can be temporary or permanent if the person does not return to their place of origin.

Current Migration Trends

Internal or National Migration

In underdeveloped countries, a displacement of peasants into cities is occurring, which is known as the rural exodus. In developed countries, migrations occur between cities for study or work. Internal migration can provoke strong regional imbalances.

External or International Migration

• From less developed to developed countries: The majority are unskilled workers who occupy tasks that are often underestimated.
• Among developed countries: Generally, these are qualified persons who cannot find work in their own country or seek to improve their situation.
• From poorer to developing countries: Some migrants move from poorer nations to countries in the process of development in search of better employment opportunities.

The Effects of Migration

Impact on Countries of Origin

Migration produces certain benefits for the country of departure:

• On one hand, it reduces pressure on employment as the emigrated population is often of working age.
• Money also flows back into the country, as migrants send remittances home from abroad.

However, it also causes problems:

• Families are broken and there is a demographic imbalance between males and females, which complicates the formation of new families.
• It alters the population structure by age, as mostly the elderly and children remain.
• The highly qualified often migrate to more developed countries, to the detriment of their country of origin.

Impact on Destination Countries

Benefits occur in the countries of arrival:

• An increase in the young population and, consequently, the birth rate.
• Immigrants contribute to the country's economic growth through their work.
• An increase in the population that pays taxes needed to finance pensions and social services.
• There is a significant cultural enrichment.

However, problems can also arise in destination countries:

• The massive influx of immigrants can quickly overwhelm health services.
• Immigrants often live in ghettos or slums within big cities.