In one of the most significant political speeches of his papacy, Leo called on governments to pursue peace, address the root causes of migration and exercise greater ethical oversight of emerging technologies, including artificial intelligence.”The world is undergoing a profound spiritual and cultural crisis, which is manifested in multiple forms of violence, polarization, and mutual distrust,” the pope told lawmakers in Madrid.

Speaking hours after renewed exchanges of fire between Israel and Iran, he said military force could not provide lasting solutions to global conflicts.”Weapons can impose a temporary silence, but they can never build an authentic and lasting peace,” he said.The address, delivered in Spanish and met with a prolonged standing ovation, marked the first speech by a pope before Spain’s national parliament and formed a centerpiece of Leo’s week-long visit to the country.

The pontiff devoted significant attention to migration, describing the treatment of migrants as a test of the international community’s moral principles. He argued that governments should move beyond simply managing migration flows and instead address the underlying causes driving displacement, including war, poverty and climate change.

“The moral greatness of a nation is manifested above all in its capacity to accompany, protect, and love those lives that pass through the greatest fragility,” Leo said.His remarks come as Spain continues to confront migration pressures along routes linking West Africa to the Canary Islands.

According to rights group Caminando Fronteras, more than 3,000 migrants died attempting the crossing in 2025.Leo also criticized the acceleration of defense spending across Europe, describing the trend as troubling at a time when diplomatic efforts should be prioritized.

European military expenditures rose sharply over the past year amid security concerns and pressure from the United States for NATO members to increase defense budgets.Spanish Prime Minister Pedro Sanchez has resisted calls for NATO countries to raise defense spending to 5% of gross domestic product, although Spain’s military budget has increased substantially during his tenure.The pope further urged governments to establish rigorous ethical safeguards governing the use of artificial intelligence, particularly in military applications.

Last month, he issued a broader appeal for international oversight of advanced AI systems.Addressing relations between religion and the state, Leo defended religious freedom and argued that faith should remain part of public discourse.

He also reaffirmed the confidentiality of the Catholic seal of confession, which prohibits priests from disclosing information shared during confession.Several European countries have debated whether clergy should be legally required to report allegations of abuse disclosed during confessions following a series of sexual abuse scandals within the Catholic Church.

Leo said preserving the confidentiality of confession protected a sacred space of individual conscience and spiritual freedom.Although the Vatican has announced that the pope will meet victims of clerical abuse during his visit to Spain, Leo did not address the issue directly in his parliamentary speech.

The visit reflects the pope’s increasingly active engagement with global political debates, including war, migration, technology and the role of democratic institutions in addressing mounting international challenges.

The visits will take the pontiff to two major gateways for African migrants seeking entry into Europe. Although migrant arrivals have fallen this year, particularly in the Canary Islands, immigration and integration remain contentious issues across Europe’s traditionally Catholic societies.

Church leaders and migrant advocates hope the trips will shift attention toward humanitarian concerns and the challenges faced by migrants rather than political disputes.

The pope is expected to meet migrants and pay tribute to those who died attempting dangerous sea crossings. His visit follows the migration-focused legacy of Pope Francis, who made Lampedusa the destination of his first pastoral trip outside Rome in 2013.

Catholic organizations in Spain and Italy continue to provide assistance to migrants arriving through Atlantic and Mediterranean routes, while debates over migration policy increasingly divide political parties and public opinion.

The visits come as European governments balance border control measures with growing calls from religious and humanitarian groups for a more compassionate approach toward migrants and asylum seekers.