Igor Sibaldi is a bestselling Italian author, philosopher, and scholar of religion whose books have sold more than 500,000 copies and whose lectures have been viewed more than 24 million times on YouTube. In his new book, How Not to Be Stupid: The Transformative Power of Independent Thinking (Pan Macmillan, 2026), now available in the United States, he argues that stupidity is not a lack of intelligence but the habit of never questioning the rules we inherit.

Igor Sibaldi is a bestselling Italian author, philosopher, and scholar of religion whose books have sold more than 500,000 copies and whose lectures have been viewed more than 24 million times on YouTube. In his new book, How Not to Be Stupid: The Transformative Power of Independent Thinking (Pan Macmillan, 2026), now available in the United States, he argues that stupidity is not a lack of intelligence but the habit of never questioning the rules we inherit.
A TEDx speaker, he has given more than 1,000 courses and live lectures internationally, reaching hundreds of thousands of people in person, and appears on radio and television around the world. His books have been translated into many languages, and he has made his own translations of the Gospel of John and Genesis from the original Greek and Hebrew.
Provocative, witty, and deeply erudite, Sibaldi turns big ideas into practical questions listeners can apply to their own lives.