«Nexus» means link or connection, and it is the word with which Harari synthesizes the condition of our era: everything is connected. From the data we share on social networks to the supply chain that supports the global economy, we live in a system where every action resonates beyond national borders. The author insists that understanding this invisible network is essential to anticipate crises and make collective decisions.
The three axes of the essay
The book revolves around three decisive fields:
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Artificial intelligence and political power
Harari warns about the risk that algorithms, invisible to most, may influence elections, public opinion, and strategic decisions. In the hands of authoritarian governments or large corporations, AI can become an unprecedented tool of control. -
Biotechnology and the redefinition of humanity
The author examines genetic manipulation, the artificial prolongation of life, and the possibility of designing custom organisms. These practices open doors to new medical horizons, but also raise ethical dilemmas that question the very notion of humanity. -
Interconnected global crises
Pandemics, climate change, and mass migrations are phenomena that no country can solve alone. Harari underscores the need to strengthen international cooperation at a time when geopolitical tensions are pointing in the opposite direction.
Harari retains the formula that made him famous: a highly accessible popular essay for non-specialized readers but backed by historical and scientific sources. More than offering technical solutions, his intention is to provoke questions: who controls the data that governs our daily lives? Can we maintain solid democracies if information is in the hands of algorithms? How do we prevent biotechnology from becoming a privilege of elites?
Although the tone of Nexus is occasionally somber, Harari does not abandon hope. He points out that humanity still has room to decide how to use technology, as long as there is transparency, regulation, and a global ethical commitment. The future is not written, he repeats, and what seems inevitable today can change with the right political and social decisions.
In a decade marked by digital acceleration, economic uncertainty, and the climate crisis, Nexus serves as a cultural compass. It is not a technical manual, but rather an invitation to actively participate in the conversation about the direction of humanity. Harari reminds us that leaving these decisions in the hands of algorithms or technological elites would be a dangerous renunciation.
