A small book about a big subject. In rigidly simple terms, The One Thing offers a description of all that exists, how it came to be, and the future of its most complex development: human thinking. It maintains that Ideas are a natural feature of the universe, following paths of development and decay, of coming to be and passing away, just like all other universe events. That highly complex dynamic know as "human thinking" will eventually succumb to an end similar to the one that massive stars are likely to experience, eventually (inevitably) giving way to inexorable implosive forces, finally disappearing into its own singularity. Current efforts to develop artificial intelligence are nothing but the first step along this path, a Way that ultimately leads to the end of human thinking.