The Biology of Equality: Bertha Lutz and the Science of Feminism
I had heard of Bertha Lutz before—as a women’s rights activist, a leader in Brazil’s suffragist movement, and one of the four women who signed the UN Charter in 1945, the document that officially established the United Nations. That’s how she’s usually remembered: a fierce feminist, a diplomat, someone who stood her ground at the world’s most important political tables. But what surprised me was where else her name shows up—not in laws, monuments or even street names, but in frogs and lizards!!
It turns out Bertha Lutz was not only a political force, but also a trained biologist and naturalist. Before her name became tied to international diplomacy, she was studying amphibians at the Sorbonne and working as a researcher at Brazil’s National Museum. Her background in biology wasn’t a footnote—it shaped the way she thought, worked, and fought. She approached activism with the same discipline and curiosity she applied to science.
I’m often struck, in conversations with fellow researchers, by how the precision and critical thinking we apply in the lab don’t always extend to our broader views about the world. But figures like Bertha Lutz stand out. They show what it looks like when scientific rigor shapes not just research, but social interactions as well—when the tools of inquiry are used to question injustice, imagine alternatives, and push for lasting transformation. From microscopes to microphones, rainforest trails to negotiation halls, she brought the same clarity of thought and persistence to every arena.
Bertha Lutz was born in 1894 in São Paulo, Brazil, to a British mother and a Brazilian father of Swiss descent, the renowned physician and naturalist Adolpho Lutz. From him, Bertha inherited a deep interest in the natural sciences. Their travels through Brazil’s rainforests, where Bertha first studied tree frogs, laid the foundation for her lifelong engagement with biology. She would go on to earn a degree in natural sciences from the Sorbonne in 1918, specializing in biology and zoology. Upon returning to Brazil, she was appointed secretary at the National Museum of Rio de Janeiro in 1919—only the second woman in the country to hold a public service post. At the National Museum, Lutz began building her reputation as a pioneering herpetologist. She published extensively on frogs and amphibians and was eventually promoted to head of the biology section.
Even at the time, when her scientific career took off, women in Brazil faced limited access to education and public life. Lutz was becoming increasingly engaged with feminist ideas she encountered while studying in Europe, especially the suffrage movement in England. Although she did not agree with its more militant tactics, she was drawn to the movement’s emphasis on political equality, women’s autonomy, and the right to participate in public life. Shortly after returning to Brazil, she began writing publicly about women’s rights and published a feminist manifesto in the Revista da Semana, arguing for women’s equal access to education and professions and emphasising the importance of their participation in politics and public life. In 1919, the same year she joined the National Museum in Rio de Janeiro as a biologist, Lutz launched her feminist journey in earnest by co-founding the Liga para a Emancipação Intelectual da Mulher (League for the Intellectual Emancipation of Women) with teacher and author Maria Lacerda de Moura. They envisioned the League as a platform for advancing women’s intellectual development, moving past the charitable and moral reform work that typically defined women’s public roles at the time.
The League included around 40 women—and a few men—selected mainly for their education, social status, and alignment with middle-/upper-class norms, which reinforced its elitist notions. However, ideological tensions soon surfaced. Maria Lacerda de Moura, an anarchist and more radical in her politics, parted ways with Lutz, criticizing the League’s narrow focus on suffrage and its appeal primarily to literate, wealthy women. The tensions between Lutz and Moura were not isolated, but rather emblematic of broader struggles within early feminist organizing across the Americas. Early feminist movements across the Americas often prioritized the concerns of educated, urban women and largely excluded the realities of working-class or rural women. By emphasising political rights without addressing broader social and economic inequalities, these movements risked reproducing existing hierarchies even as they sought to challenge gender-based ones. These dynamics remain deeply relevant today, as feminist discourse continues to grapple with questions of inclusion and representation. The rise of intersectional feminism reflects a critical response to this legacy, calling attention to how race, class, caste, and other structures of power shape women's lived experiences and the agendas of feminist activism.
Lutz’s own activism was not immune to these contradictions. While she challenged gender-based exclusion, her efforts often operated within the social boundaries of her class and education. Yet, she also strategically leveraged these very privileges. Her scientific background gave her authority and prestige in transnational feminist spaces, where her belief that women were biologically equal yet distinct from men proved a strategic—although conservative—position. This stance allowed her to navigate both scientific and political communities, gaining legitimacy and forging alliances. In doing so, she helped bring international attention to the Brazilian suffrage cause, even as she moved within a framework that struggled to fully address the intersecting inequalities.
In 1922, Bertha Lutz founded the Federação Brasileira pelo Progresso Feminino (Brazilian Federation for Women's Progress, FBPF), which soon became the country’s most influential feminist organization. Affiliated with the International Women’s Suffrage Alliance, the FBPF initially embraced a difference-based approach to women’s rights. Lutz and her colleagues argued that genuine equality required acknowledging the biological and social differences between men and women, particularly in the workforce. As such, they advocated for protective legislation, supporting International Labour Organization conventions that restricted night work for women and promoted maternity leave. For Lutz, Brazil’s legal system was structurally discriminatory, and the path to equality involved creating legal spaces that acknowledged women’s roles as both workers and caregivers.
In the early 1920s, Lutz turned her attention to rural education and economic development. With support from the Ministry of Agriculture, she conducted a pioneering study on the dissemination of domestic and agricultural knowledge among Brazil’s rural population. For Lutz, this research wasn’t merely academic—it was a strategic step toward organizing regional women’s industrial cooperatives that could empower women economically. Her work led her to travel abroad: in 1923 to the United States, and in 1929 to Belgium, where she studied how other countries integrated domestic agricultural education into rural development. Her contributions were recognized with an award from the Belgian government in 1923, underscoring the international relevance of her applied research.
Lutz also applied her scientific sensibility to reforming educational institutions at home. In 1924, as a delegate of the National Museum to the Education Congress, she successfully lobbied for the admission of girls to Colégio Pedro II, one of Brazil’s most elite schools. This was more than a symbolic victory—it represented a strategic move to open access to the same educational pipelines that had long trained Brazil’s male political and administrative elite.
Her activism grew increasingly legalistic in the following decade, bolstered by her academic pursuits in law. While studying at the University of Rio de Janeiro, Lutz wrote her thesis on the nationality of married women in private international law, a topic that revealed how legal systems curtailed women’s autonomy through marital status. This legal training sharpened her critique of Brazil’s civil codes and equipped her with the tools to advocate for systemic change. In 1932, Lutz and several women activists met with then “interim president” Getúlio Vargas, who had come to power in a coup two years earlier. Their intervention helped bring about a presidential decree that extended voting rights to women, though these rights remained limited by literacy requirements, which disproportionately affected women. Two years later, in 1934, Lutz participated in drafting the new constitution as a representative for women. This landmark document enshrined women's suffrage in Brazilian law, making Brazil the third country in Latin America to do so.
After this major achievement, both Lutz and the FBPF began to shift their ideological stance from the earlier difference-based approach to one rooted in legal and civil equality. Her experiences in professional and political environments had shown her that protective legislation could be a double-edged sword, often reinforcing the idea that women belonged in domestic roles. Her advocacy increasingly focused on issues like equal pay, professional opportunities for women, and the independent right of married women to work. She began rejecting measures that defined women solely by their roles as wives and mothers, instead emphasizing women’s equal personhood under the law.
In 1936, Lutz was elected to Brazil’s National Congress, becoming one of the first women to hold such office. One of her initial legislative initiatives was the proposal for a “Statute on Women,” which proposed a committee to review discriminatory laws. She also spearheaded the formation of a Special Commission on the Status of Women in Congress, serving as its chair. Notably, she was its only female member, underscoring the entrenched gender imbalances she sought to dismantle.
But her parliamentary career was cut short. In 1937, Vargas carried out a second coup, dissolved Congress, and imposed an authoritarian regime under a new constitution. With democratic institutions suspended, Lutz withdrew from political office and most of her administrative roles in feminist organisations. Instead, she turned her energy to science and to preserving the legacy of her father, the eminent physician and scientist Adolfo Lutz. She headed the Botanical Sector of the National Museum and resumed her own fieldwork, publishing extensively on amphibians, particularly tree frogs, and contributing to the broader inclusion of women in the natural sciences.
Still, her retreat from frontline politics did not mean disengagement. Fluent in English, French, and German, Lutz remained a committed force in international diplomacy and women’s rights advocacy. In 1944, she was appointed as an advisor to the Brazilian delegation at the International Labour Organization Conference. The following year, she represented Brazil at the San Francisco Conference that led to the founding of the United Nations. There, she joined a small but determined group of women delegates who fought to ensure that the term “sex” would be explicitly included in the Universal Declaration of Human Rights. “There will never be an unbreakable peace in the world until the women help to make it”, she said in a speech at the conference. Their lobbying succeeded: Article 2 now guarantees fundamental rights to all, “without distinction of any kind, such as race, colour, sex, language…”
Bertha Lutz is now known as one of the founding figures of Brazilian feminism—a symbolic and political force whose advocacy spanned nearly five decades. In August 1965, her lifelong contributions were formally honored when she was awarded the title of professor emeritus by the Federal University of Rio de Janeiro. A decade later, in 1975, during the United Nations’ International Year of the Woman, Brazil invited Lutz—then in her eighties—to represent the country at the International Women’s Conference in Mexico City. It would be her final major public engagement. She passed away the following year, in 1976, at the age of 84, leaving behind a legacy that helped reshape the legal, educational, and political landscape for generations of Brazilian women.
Her legacy continues to resonate. On May 24, 2023, UNESCO inscribed the documentary collection Feminism, Science, and Politics – the Legacy of Bertha Lutz into its Memory of the World Register, commemorating the enduring significance of her contributions to both feminist thought and scientific history. The honor is fitting: Lutz’s political activism was inseparable from her scientific worldview. Her scientific credentials and elite background lent credibility to her advocacy, making her feminism more acceptable to U.S. allies and more visible in global media. This strategic blend of science and diplomacy helped position Brazilian suffrage on the world stage. Today, her influence endures not only through historical memory but also through concrete recognition: the Bertha Lutz Diploma, awarded by the Brazilian Federal Senate, credits women who have made significant contributions to the defense of women’s rights and gender equality in Brazil.
Her story is not just one of personal achievement, but of how a scientific mind—sharp, methodical, and endlessly curious—can become a powerful force for political transformation. Lutz exemplifies how women of science brought the tools of their disciplines—rigorous analysis, empirical reasoning, and a commitment to truth—to challenge the social and political norms of their time. Many of the key figures in the suffragist and feminist movements shared this conviction: that science, when freed from bias, revealed the intellectual and moral equality of women and men. Lutz’s life invites us to reconsider the boundaries between science and activism, and to ask what it means to carry a critical, evidence-based sensibility into struggles for justice.
At the same time, her story reminds us that people are complex, often contradictory, and inevitably shaped by their historical and social contexts. Lutz held views that might strike us today as inconsistent—valuing hierarchy while advocating for women's rights—but such tensions reflect the realities of her era rather than diminish her contributions. I am one of those people who think that what ultimately matters is not ideological consistency, but the willingness to learn, to grow, and to act. For Lutz, science was more than a career—it was a framework for understanding the world and a tool for reforming it. In her example, we see how intellectual rigour and political engagement can coexist, and how the pursuit of knowledge can drive not only discovery but lasting social change.
Written by Janaky S. and edited by Parvathy Ramachandran @ThinkHer
👍👍👍👌👌
ReplyDeleteThanq
Delete