In recent years, presidential elections across South America have produced very sharp swings between left- and right-wing leadership, raising questions about whether the region is undergoing an ideological transformation or simply cycling through dissatisfaction with incumbent governments. Argentina’s election of libertarian Javier Milei in 2023 and Chile’s election of conservative José Antonio Kast in 2025 suggest a shift towards the right, while the election of left-wing Luiz Inácio Lula da Silva has suggested otherwise. Are voters embracing a shift to the right, or simply turning away from incumbent governments in search of an alternative?
Look at the ongoing Brazilian presidential election. In the first round on October 4, Senator Flávio Bolsonaro received 47.03 percent of the valid vote, narrowly beating incumbent President Lula da Silva, who received 45.16 percent of the vote. However, neither candidate secured the needed majority, setting up a runoff for October 25. This contest reflects more than a disagreement over individual policies. Lula, a member of the left-wing Workers’ Party, has emphasized social programs for reducing inequality and environmental protection. On the other hand, Bolsonaro has campaigned on public security and less fiscal spending. The close result highlights the competing political priorities and divisions shaping Brazil’s future.
The stakes extend well beyond the executive branch in Brazil. The October 4 legislative elections also strengthened conservative forces in Congress; they won 121 seats in the lower house and became the largest party in the Senate, illustrating that the right’s influence over Brazil extends beyond the presidential race. So, even if Lula wins the runoff, Congress’s balance of power could constrain his policies and intensify disputes over the judiciary, public spending, and social issues. Reuters reported that right-wing and centrist parties could hold a majority in both chambers of Congress, potentially making it very hard for Lula to pass any of his left-wing agenda.
These elections will affect far more than just Brazil. As South America’s largest economy, it influences trade policy and environmental policy within the continent. For example, a change in leadership could reshape how Brazil approaches controversial international issues such as deforestation in the Amazon Rainforest. Additionally, Brazil has important relations with other foreign powers such as the United States and China. Lula emphasizes international cooperation and stronger ties with emerging economies, while Bolsonaro has favored a more conservative foreign policy and closer ties with the United States, Israel, and Argentina. This demonstrates that the outcome of this election could decide Brazil’s future foreign policy and the international relations it chooses to prioritize.
Brazil’s current election does not necessarily signify that South America is moving in the same direction. Recently, the continent has swung sharply back and forth between the left and the right. For example, Argentina elected Milei in 2023 after years of Peronist governments, a political movement associated with social justice and economic nationalism. Meanwhile, Bolivia elected center-right Rodrigo Paz in 2025 after nearly two decades of left-wing rule. Chile’s José Antonio Kast also won the presidency in December 2025, reflecting the growing appeal of conservative leadership in several countries.
But this rightward shift has not been universal. In 2022, Lula returned to the presidency in Brazil, and Colombia elected left-wing Gustavo Petro that same year. But recently, Colombia elected right-wing candidate Abelardo de la Espriella, another example of how quickly a country’s political direction can change. Recent elections suggest that South America is not moving entirely to the right. Instead, voters seem increasingly ready to vote out governments that fail to deliver on their promises, regardless of their past political identity.
But what is driving this shift?
Most South American voters care little for the opposition’s ideology when daily problems remain unsolved under whatever current administration. South Americans are facing higher prices for basic products and services, along with rising crime; this gives the opposition opportunities to present itself as different and offer new ideas, which they claim will solve these issues. According to the OECD’s 2025 survey on trust in public institutions, 60 percent of respondents across Latin America and the Caribbean identified crime or violence as one of the three most important issues facing their countries. These concerns help explain the electoral shifts between left- and right-wing governments across the region. When voters become dissatisfied with how incumbents address security and economic issues, they may turn to candidates prioritizing a different approach.
Under this explanation, voters will shift between opposing political camps when governments fail to meet expectations – creating a political pendulum. A left-wing candidate may win elections after voters become dissatisfied with a conservative predecessor’s policies, only to face similar discontent if economic or security concerns persist under their administration. However, this political pendulum is not a universal explanation. These rapid electoral shifts may indicate lasting changes in values, political identities, or expectations of government.
Brazil’s election illustrates the difficulty in interpreting South America’s political direction through individual contests. Recent victories by conservative candidates suggest the region’s political landscape has changed, but left-wing victories in other elections complicate the idea of a universal regional shift. Brazil’s closely contested presidential race and divided legislature further demonstrate that electoral victories do not necessarily translate into lasting political consensus. The future of South American politics is unclear as changing voter priorities and dissatisfaction with existing governments continue to shape the continent’s political direction. Rather than signaling an absolute shift to the left or right, Brazil’s election may reveal a region where political loyalties remain fluid, and governments must continually demonstrate to voters that they can deliver results.
The Zeitgeist aims to publish ideas worth discussing. The views presented are solely those of the writer and do not necessarily reflect the views of the editorial board.
