American Colony

The first half of the twentieth century was the period when the United States built its colonial machinery in Puerto Rico — not through neglect, but through engineering. Every structure that governs life on the island today has its blueprint in these decades: imposed citizenship, shipping monopolies, legal doctrines of inferiority, mass sterilization, political repression, and an economic model designed to benefit the metropole. When Puerto Ricans resisted, they were shot, imprisoned, bombed, surveilled, and irradiated. When they cooperated, they were offered a manufactured autonomy that changed everything except who held power.

The Insular Cases: A Legal Doctrine of Inferiority

In 1901, the U.S. Supreme Court decided a series of cases collectively known as the Insular Cases.¹ The central question was simple: does the Constitution follow the flag? The answer the Court gave would shape Puerto Rico's status for the next century. The Court invented a new legal category — the "unincorporated territory" — a place that belonged to the United States but was not part of it. Justice Henry Brown, writing for the majority, argued that territorial peoples of "alien races" could not be trusted with full constitutional rights. The logic was explicitly racist and remains the law of the land.

The Insular Cases established that Congress could govern Puerto Rico without extending the full protections of the Constitution. Puerto Ricans were neither foreign nationals nor full American citizens. They existed in a legal limbo designed to preserve congressional power over the territory while avoiding any obligation of equality. Every subsequent political arrangement — citizenship, commonwealth, statehood debates — operates within the framework the Insular Cases created. The cage was built in 1901. The bars are still there.

It is worth noting that opposition to the Insular Cases crosses all political lines in Puerto Rico. Statehood advocates also reject the doctrine — but argue it should be overturned in favor of full incorporation and equal statehood, not independence or enhanced sovereignty. The colonial critique of the Insular Cases is shared across political positions; it is the remedy where opinions diverge. For independentistas, the cases represent a legal framework that should be dissolved by ending the territorial relationship entirely. For estadistas, they represent an obstacle to the equal citizenship that statehood would confer. Both agree the current arrangement is unjust. They disagree fundamentally about what justice looks like.

Citizenship Without Consent

On March 2, 1917, President Wilson signed the Jones-Shafroth Act, collectively imposing U.S. citizenship on all Puerto Ricans.² No plebiscite was held. No consent was asked. The Act was signed one month before the United States entered World War I on April 6, making every Puerto Rican man of military age immediately eligible for the draft. The timing raises legitimate questions — though the full picture is more complicated than a simple cause-and-effect. The Jones Act had been debated in Congress for years before the war, and many scholars argue that the proximity to U.S. entry into World War I was coincidental, or at most a contributing factor that accelerated passage rather than the sole motivation. The military conscription rationale is a credible interpretation of the timing, but not the only credible interpretation.

The response to imposed citizenship was also more complex than simple rejection. Under the Jones Act, Puerto Ricans could formally decline U.S. citizenship — but only 288 did so.³ This does not mean the rest embraced it enthusiastically; many recognized the practical benefits citizenship conferred, or simply did not view a formal renunciation as a meaningful act of resistance. But the near-universal acceptance complicates narratives that treat citizenship as something uniformly imposed against the popular will. The manner of imposition is legitimately criticized. The popular response, however, was not one of mass refusal.

The Jones Act also replaced the Foraker Act's Executive Council with an elected Puerto Rican Senate, but the governor remained a presidential appointee. It was a marginal expansion of representation within a framework of total control. The citizenship came with the draft but without the vote — Puerto Ricans could die in America's wars but could not vote for the president who sent them. They still cannot.

In 1920, the Jones Act shipping provisions cemented the economic stranglehold. All goods shipped between U.S. ports — including Puerto Rico — must travel on American-built, American-crewed, American-flagged ships. For an island that imports over 85% of its food, this amounted to a permanent tax on existence. Studies have estimated the Jones Act costs Puerto Rico between $1.1 billion and $1.5 billion annually in inflated shipping costs. The law remains in effect today.

La Operación

Beginning in the 1930s and continuing through the 1970s, the United States and the Puerto Rican government carried out a mass sterilization campaign targeting Puerto Rican women. By the mid-1960s, approximately one-third of all Puerto Rican women of childbearing age had been sterilized — the highest rate in the world.⁴ The procedure was called "la operación," and it was so common that it became a casual term. Many women were not fully informed that the procedure was permanent. Many were coerced through economic pressure — told they would lose welfare benefits or employment if they didn't agree.

The campaign was rooted in eugenic ideology that viewed Puerto Rican poverty as a population problem rather than a colonial one. The logic was circular: colonialism created poverty, poverty was blamed on overpopulation, and overpopulation was solved by sterilizing the colonized. U.S. pharmaceutical companies also used Puerto Rican women as test subjects for early birth control pills in the 1950s, conducting trials with minimal informed consent and ignoring severe side effects that were reported.

The full history of la operación, however, is more complicated than a straightforward narrative of government-imposed mass sterilization. While approximately one-third of women who were sterilized did not know the procedure was permanent — making those cases coercive by any standard — others chose sterilization deliberately, in a context where reliable contraception was largely unavailable and abortion was illegal. For some women, sterilization was the only accessible form of reproductive control. The eugenic framework that drove the policy was real, the lack of informed consent in many cases was real, and the scale was staggering. But characterizing every case as forced erases the agency of women who made a constrained choice within a system that offered them few alternatives.

Resistance and Repression

Pedro Albizu Campos was the most consequential Puerto Rican political figure of the twentieth century and the most persecuted. A Harvard Law graduate who could have pursued a comfortable career, he chose instead to lead the Nationalist Party and demand independence. For this choice, he spent 25 of his last 29 years in prison. During his imprisonment, he reported burns consistent with radiation exposure — a claim examined by a Cuban radiologist who supported it, but never confirmed by documentary proof.⁵ Whether he was subjected to deliberate radiation experiments remains disputed. He died in 1965 shortly after being released in failing health.

The repression was not limited to Albizu. On Palm Sunday, March 21, 1937, police opened fire on a peaceful Nationalist Party march in Ponce. Twenty-one people were killed — nineteen unarmed civilians and two police officers caught in their own crossfire.⁶ Over two hundred were wounded. The event became known as the Ponce Massacre. An investigation by the ACLU concluded that it was "a massacre" ordered by Governor Blanton Winship. Winship was eventually recalled to Washington. No police officer was prosecuted.

In 1948, the Puerto Rican legislature — under pressure from the colonial government — passed Law 53, known as the Gag Law. It made it a crime to own or display a Puerto Rican flag. It criminalized singing a patriotic song, talking about independence, or meeting with anyone to discuss Puerto Rican sovereignty. Modeled on the U.S. Smith Act, the Gag Law was used to arrest hundreds of independence supporters. Owning a flag of your own country was a criminal offense.

The Uprising

On October 30, 1950, the Nationalist Party launched a coordinated armed insurrection across the island. In Jayuya, Blanca Canales led an attack on the post office, raised the Puerto Rican flag, and declared the Republic of Puerto Rico. In Utuado, Nationalists attacked the police station. In Arecibo, Mayagüez, Naranjito, and Peñuelas, similar actions were taken simultaneously. The U.S. response was overwhelming: the National Guard was deployed, and the towns of Jayuya and Utuado were bombed from the air.⁷ The United States bombed its own citizens on its own territory.

Two days later, on November 1, 1950, two Puerto Rican Nationalists — Oscar Collazo and Griselio Torresola — attempted to assassinate President Harry Truman at Blair House in Washington. Torresola was killed. Collazo was sentenced to death, later commuted to life imprisonment, and eventually pardoned by President Carter in 1979. The assassination attempt made international headlines, but the bombing of Puerto Rican towns did not.

The aftermath was devastating. Thousands were arrested under the Gag Law. The carpetas — government surveillance files — were opened on anyone suspected of pro-independence sympathies. The Nationalist movement was effectively destroyed as an organized political force. But the demand for independence did not disappear. It went underground, into the diaspora, into the universities, and into the cultural production of a people who refused to stop being a people.

Bootstrap and the Colonial Bargain

In 1948, Luis Muñoz Marín became the first governor elected by Puerto Ricans — fifty years after the invasion. He was a complex figure: a former independence supporter who concluded that sovereignty was economically unfeasible and chose instead to work within the colonial framework. His signature program, Operation Bootstrap, transformed Puerto Rico from an agricultural economy to a manufacturing one⁸ by offering U.S. corporations tax exemptions, cheap labor, and access to U.S. markets.

Bootstrap worked — by certain measures. Per capita income rose. Life expectancy increased. Literacy expanded. And the scale of this transformation deserves acknowledgment: whatever its costs and limitations, Operation Bootstrap genuinely transformed Puerto Rico from one of the poorest places in the Western Hemisphere to a middle-income economy within a few decades. Life expectancy rose from roughly 46 years in 1940 to over 70 by the 1970s. Literacy rates soared. Educational attainment expanded dramatically, with university enrollment growing exponentially. For millions of Puerto Ricans, the material improvements were real and life-changing. But the model was built on dependency. When tax exemptions expired or cheaper labor was found elsewhere, the factories left. The agricultural economy that was dismantled to make room for factories was never rebuilt. Puerto Ricans who lost their land migrated — to San Juan's expanding slums, to New York, to Chicago, to Philadelphia. The Great Migration of the 1940s and 1950s sent hundreds of thousands of Puerto Ricans to the mainland, creating the diaspora communities that exist today.

In 1952, Muñoz Marín's government produced a constitution under Public Law 600, creating the Estado Libre Asociado — the "Free Associated State," marketed in English as the "Commonwealth." The United States used it to tell the United Nations that Puerto Rico was no longer a colony, successfully removing it from the UN's list of non-self-governing territories. But the constitution changed nothing fundamental about the power relationship. Congress retained plenary authority over Puerto Rico under the Territorial Clause of the U.S. Constitution. The Supreme Court has confirmed this repeatedly. The Commonwealth was a new name for the same arrangement. The cage got a coat of paint.