Meghan Garrity details the history of mass expulsions since the centennial of the signing of the Lausanne Convention—a treaty codifying the compulsory “population exchange” between Greece and Turkey. An estimated 1.5 million people were forcibly expelled from their homes: over one million Greek Orthodox Christians from the Ottoman Empire and 500,000 Muslims from Greece.

Meghan M. Garrity, an International Security Program postdoctoral fellow at the Harvard Kennedy School's Belfer Center discussed her research on government-sanctioned mass expulsion events at a virtual seminar on November 3, 2022.

This article introduces the Government-Sponsored Mass Expulsion (GSME) dataset documenting cross-border mass expulsion episodes around the world from 1900 to 2020. This new dataset focuses on mass expulsion policies in which governments systematically remove ethnic, racial, religious or national groups, en masse. The GSME dataset disaggregates mass expulsion from other exclusionary politics concepts to isolate policies of intentional group-based population removal. This allows for a systematic examination of governmental expulsion policies, distinct from policies aimed at annihilation (genocide), control (massacre) or cultural elimination (coercive assimilation).

According to the U.N. High Commissioner for Refugees, at the end of 2021 nearly 90 million people were forcibly displaced worldwide. What makes Uganda's expulsion of 50,000 Asians distinct? Unlike most displaced people, the Asians expelled from Uganda weren't fleeing conflict or natural disasters. Instead, the forced displacement that year is what political scientists call a mass expulsion. That's when a government implements an ethnically targeted policy to remove a group of people, en masse, without individual legal evaluations and refuses to allow them to return.