In an environment where technological ethics are tested daily, brothers Dario and Daniela Amodei, founders of Anthropic, have emerged as key figures in the debate over the limits of artificial intelligence. Born in San Francisco, Dario (42) and Daniela (39) lead one of the most valued start-ups in the sector, which recently challenged the U.S. Department of Defense by refusing to relax the ethical restrictions of its AI model, Claude. Last week, the Pentagon summoned Dario, CEO of Anthropic, to a meeting in Washington to negotiate the use of their technology in military applications. The U.S. government sought to have Anthropic remove the limitations that prevent the use of its AI for tasks such as mass surveillance or integration into autonomous weapon systems. However, the company rejected the proposal, arguing that accepting those conditions could lead to dangerous uses contrary to its foundational principles. This decision could cost Anthropic a contract of up to $200 million and its exclusion from future government agreements, as it is considered a "supply chain risk" in defense. Nevertheless, the Amodeis have chosen to maintain their stance, prioritizing safety and ethics over immediate commercial interests. The Amodei family history is marked by diversity and effort. Their mother, Elena Engel, led public library projects in California, while their father, Riccardo Amodei, was an Italian blacksmith who passed away in 2006. Dario, from a young age, excelled in sciences, participating in the U.S. physics olympiad and studying at Caltech, Stanford, and Princeton, where he earned a PhD in biophysics. Daniela, on the other hand, focused on the humanities and music, graduating with honors from the University of California Santa Cruz and participating in public health and international development projects before entering the tech sector. Both siblings met at OpenAI, where Dario led the development of models like GPT-2 and GPT-3, and Daniela directed technical and safety teams. In 2020, they decided to found Anthropic along with other colleagues, motivated by their disagreement with the commercial direction OpenAI had taken under Sam Altman. Since its inception, Anthropic has experienced meteoric growth. Recently, the company closed a funding round that values it at $380 billion, and the Amodeis have been included in the Time 100 AI list. Despite their success, both have criticized the concentration of wealth in the sector and claim to donate most of their income. However, Anthropic has had to adapt its security policy to avoid falling behind the competition, acknowledging that maintaining stricter restrictions has not influenced the behavior of the rest of the sector. The company admits that its previous approach is no longer viable in the current U.S. political climate, which is more resistant to regulation. This change has sparked debate among its supporters, who see the relaxation of its principles as a possible renunciation of its original values. Nevertheless, the Amodeis' trajectory demonstrates that, in the complex world of artificial intelligence, defending the common good sometimes requires making difficult decisions and navigating gray areas.