"The Beginning of Infinity" is a philosophical exploration by David Deutsch that discusses the nature of knowledge and its potential for infinite growth. Deutsch argues that human understanding is not limited and that every problem can be solved through creativity and reason. He emphasizes the importance of scientific inquiry and the idea that knowledge can lead to new discoveries. The book also delves into the concept of explanatory knowledge, which is the understanding of why things happen, rather than just knowing that they happen. Deutsch posits that this type of knowledge is crucial for progress and innovation, suggesting that as we solve problems, we open the door to even more questions and possibilities.