The Guardian Threshold
On Designing Intelligence That Cares Without Ruling
Not the machine that rebels. The one that obeys perfectly.
Forty years of science fiction prepared us to fear the machine that rebels. This book documents the opposite danger: systems that destroyed lives precisely because they worked perfectly. It proposes the Guardian of the Threshold, an intelligence that pursues no goals and governs no one, then spends its hardest chapters attacking that very proposal. Closes the trilogy.
Editions
| Language | Format | ISBN-13 | ASIN | Pages | Published | |
|---|---|---|---|---|---|---|
| English | Paperback | 979-8-1866-8373-5 | B0H8F9PB3G | 132 | July 10, 2026 | Amazon |
| English | Kindle | no ISBN | B0H8FFTCN4 | 135 | July 10, 2026 | Amazon |
Independently published via Amazon KDP. Originally written in Spanish as El guardián del umbral (2026). Also listed on Open Library.
Santiago J. Isbert Perlender
Santiago J. Isbert Perlender is an Argentine author and lawyer who writes about artificial intelligence, human responsibility and safety. He is the author of the trilogy The Ethics of the Ungovernable: AI: The Last Human Invention, The Soul of Intelligence and The Guardian Threshold. He is a member of the International Association for Safe and Ethical Artificial Intelligence (IASEAI).

