The Khmer Rouge, a radical communist regime led by Pol Pot, ruled Cambodia from 1975 to 1979 and was responsible for one of the worst genocides of the 20th century. The brutal three-year, eight months and twenty days reign, which killed nearly two million Cambodians, continues to cast a long shadow over the nation’s political, social, and psychological landscape.

The Khmer Rouge regime (1975–1979).

Rise to power:

• Growing insurgency: The Khmer Rouge, originally a small communist guerrilla movement, gained support amid the Cambodian Civil War (1967–1975), which was fueled by the spillover of the Vietnam War. U.S. bombing campaigns targeting Vietnamese communist forces further destabilized Cambodia, driving many peasants to join the Khmer Rouge.
• “Year Zero”: On April 17, 1975, the Khmer Rouge seized the capital, Phnom Penh, ending the civil war and beginning their radical social engineering project to create an agrarian communist utopia.

Key policies and atrocities:

• Forced urbanization: The regime immediately evacuated cities, including Phnom Penh, and forced millions of residents, known as “new people,” into the countryside to work in forced labor camps. The goal was to dismantle existing social structures and eliminate “corrupting” urban influences.
• Genocidal purges: The Khmer Rouge targeted and systematically executed anyone perceived as a threat to their ideology.

  This included:

  • Intellectuals and professionals: Doctors, teachers, lawyers, artists, and former government and military officials were killed. Wearing glasses or speaking a foreign language was enough to be executed.
  • Ethnic and religious minorities: Chinese, Vietnamese, Thai, and the Cham Muslim community were persecuted, with an estimated 70% of the Cham population exterminated. Buddhist monks were defrocked and killed, and places of worship, including Phnom Penh’s cathedral, were destroyed.
  • Internal purges: Thousands of Khmer Rouge cadres were also executed after being denounced as traitors.

• Dehumanization: The regime dissolved family units, prohibited affection, and indoctrinated children to spy on and report on adults. It also abolished money, private property, and markets and banned education, healthcare, and religion.
• Starvation and overwork: Gross economic mismanagement and brutal forced labor practices in the communal farms led to widespread starvation and disease. An estimated 1.5 to 2 million people died from execution, exhaustion, and famine during the regime’s rule.

Overthrow and aftermath:

• Vietnamese invasion: Following border conflicts, Vietnam invaded Cambodia in December 1978 and overthrew the Khmer Rouge in January 1979, ending the genocide.
• Continued insurgency: Remnants of the Khmer Rouge retreated to the border with Thailand and continued a guerrilla war for nearly two decades, with China and some Western powers recognizing their coalition government in exile for years.

The Khmer Rouge’s enduring legacy

Social and psychological effects:

• Intergenerational trauma: Studies show elevated rates of post-traumatic stress disorder and depression among survivors and their descendants, highlighting the long-term psychological toll. Mental health services in the country remain severely underfunded and insufficient.
• Culture of silence and fear: The trauma of the regime, which pitted neighbor against neighbor, taught many to distrust others and to remain silent to survive. This impulse continues to shape public life today.
• Displaced and traumatized populations: The mass displacement during the Khmer Rouge era created a large refugee population, with many fleeing to neighboring countries and eventually resettling in the U.S., among other places.

Pursuit of justice and remembrance:

• Khmer Rouge Tribunal: The Extraordinary Chambers in the Courts of Cambodia (ECCC) was established in 2006 as a hybrid domestic and UN-backed court to prosecute senior Khmer Rouge leaders.
• Limited convictions: Though it operated for over a decade and cost millions, the tribunal only convicted three senior figures. The death of other leaders and political interference hampered efforts to achieve full justice.
• Sites of memory: Memorials like the Tuol Sleng Genocide Museum (a former torture center) and the Killing Fields at Choeung Ek serve as stark reminders of the regime’s brutality, attracting tourists and memorializing victims. However, many other local commemorative sites are neglected.

Economic and development challenges:

• Brain drain: By eliminating the country’s intellectual class, the Khmer Rouge caused a lasting void in human capital that has inhibited Cambodia’s development. This legacy is still reflected in weaknesses within the education, legal, and other professional sectors.
• Uneven recovery: While Cambodia has seen economic growth, it remains dependent on sectors vulnerable to external shocks. Much of this growth has been concentrated in cities, exacerbating the rural-urban divide that the Khmer Rouge manipulated.