The global number of people who have fled their homes reached a new record of 65.6 million last year as a major new refugee crisis emerged in South Sudan, the UN Refugee Agency (UNHCR) says.
While the UNHCR's annual count marked a new high, the flow slowed for the first time in several years in 2016.
Last year, 10.3 million people newly fled abroad or became internally displaced within their country, compared to 12.4 million a year earlier.
However, UN refugee chief Filippo Grandi warned against viewing this as a positive trend, pointing out that the total of 65.6 million is larger than the population of Britain.
"By any measure this is an unacceptable number, and it speaks louder than ever to the need for solidarity and common purpose in preventing and resolving crises," the UN high commissioner for refugees said in Geneva.
The internal strife in South Sudan has become the source of the fastest-growing displacement crisis in the world.
The number of South Sudanese who fled abroad rose by 64 per cent to 1.4 million in the second half of last year. The total has now reached nearly 1.9 million. Another two million people are internally displaced.
South Sudan turned into the third-biggest source of refugees abroad last year, behind Syria (5.5 million) and Afghanistan (2.5 million).
The Syrian and Afghan crises have attracted the attention of the world, not least because of the masses of people who have fled to Europe in past years.
In contrast, nearly of all of the South Sudanese refugees have sought protection in neighbouring countries such as Uganda, Ethiopia and Sudan.
"No refugee crisis today worries me more than South Sudan," the UNHCR's Africa chief Valentin Tapsoba said, pointing out that two thirds of the refugees amid the deepening conflict are children.
The remaining seven of the top 10 biggest refugee source countries save for one are all in Africa: Somalia, Sudan, Congo, Central African Republic, Myanmar, Eritrea and Burundi.
Nearly all of the biggest refugee hosts are developing countries, the UNHCR report shows.
Syria's neighbours Turkey and Lebanon have taken in some 2.9 million and 1 million people, respectively, while Pakistan hosts 1.4 million mostly Afghan refugees.
Iran, Uganda, Ethiopia, Jordan, Germany, Congo and Kenya are also among the biggest hosts.
Donor countries should not only take in refugees but should also help to fund poorer host countries that are severely strained by helping their neighbours, the UNCHR said. The absence of such funding can lead to destabilisation and onward migration, it warned.
"For a world in conflict, what is needed is determination and courage, not fear," Grandi said.
While 10.3 million people fled last year, nearly 7.2 million refugees and internally displaced people returned home or started new lives under long-term resettlement programs in Western countries.