The movement of people across an official boundary, either internationally or nationally, with the intention of creating a permanent place of residence
The United Nations High Commission for Refugees (UNHCR) estimates 89.3 million people worldwide were forcibly displaced at the end of 2021, of which 53.2 million were internally displaced people and 27.1 million were refugees, with the remaining 4.6 million seeking asylum
Major natural disasters can displace people, such as the 2011 tsunami that forced the evacuation of Fukushima in Japan or the recent floods in Pakistan
61% of global international migrants, reside in Europe and Asia with North America hosting 21%, Africa 9%, Latin America and the Caribbean at 5%, and Oceania 3%
The Covid-19 pandemic severely restricted migration, however, there are signs of a slow return to previous levels of migration (UN, World Migration Report 2022)
Whilst most international migration is work-related, Covid 19 has shown that remote working may reduce the necessity for labour-related migration, although highly skilled workers will still be required for some jobs
The number of female migrants has increased, with women making up the majority of contract work and so adding to migration becoming temporary and circular in nature
The majority of movement is between developing and developed countries, but there are also signs of increased movement between developing (low to middle-income) countries
With developed countries reinforcing border controls in response to illegal immigration and security measures, there has been a rise in human trafficking and exploitation
China is seeing rapidly expanding urban/industrial areas across its country and this has fuelled the largest rural-to-urban migration in history, with more than 150 million people moving to meet the demand for factory workers
Since the 1950s, places such as Dhaka, Cairo, Nairobi and Sao Paulo have seen rapid growth and despite no guarantee of employment, the perceived opportunities are still greater at the point of destination than at the point of origin
Developed countries such as the USA, France, Germany and the UK experienced rural-to-urban migration since the late 18th century due to the Industrial Revolution and urbanisation