Luíza Leão Soares Pereira

About/Bio

Luíza Leão Soares Pereira is a Postdoctoral Researcher funded by the Brazilian National Council for Scientific and Technological Development (CNPq) and a Lecturer in the Postgraduate Programme in Law at Universidade Federal do Rio Grande do Sul (Brazil). She holds an LLB from Universidade Federal do Rio Grande do Sul (Brazil), an LLM (cum laude) from the University of Cambridge (UK), for which she received the Clive Parry Prize (Overseas) in International Law, and a PhD from Cambridge. She was an intern at the International Criminal Tribunal for the Ex-Yugoslavia, Office of the Prosecutor, in the Radovan Karadzic case. She considers herself a "generalist" international lawyer, but her current work explores the international legal profession's role in law-making, and how international law textbooks function as maps and molds for the discipline.

Recently Published

U.S.’s moves to label Brazilian crime syndicates as “terrorist organizations”: a prelude to the use of force?

On March 6th, 2026, the United States re-ignited their pressure on Brazil to designate two major Brazilian crime syndicates, PCC (Primeiro Comando da Capital) and Comando Vermelho, as “terrorist organizations”. In this post, I will introduce the U.S. practice to label Latin American drug syndicates “terrorist organizations”, and outline how this raises issues in relation…

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Two Weeks in Review – 14 – 27 July 2025

In the last two weeks, a range of topics were covered in EJIL Talk!, from international criminal law and human rights, to the rule of non-intervention and the sources of international law. We also have the latest installment of EJIL: the Podcast! out now for your enjoyment. Special attention has been given to two Advisory Opinions on…

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Trump’s “Tarifaço” Against Brazil: a Breach of the Non-Intervention Rule

On 9th of July 2025, the President of the United States, Donald Trump, sent a letter to the Brazilian President Luis Inácio Lula da Silva communicating that the US will impose a 50% tariff over Brazilian imports starting August 1st. The letter was released in Trump’s social media platform, Truth Social, and came as a relative surprise…

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