You are not a single, fixed self. You are a trajectory—a path taken through a labyrinth of possible personalities, choices, and experiences. Today, for a deep fifteen minutes, we explore the most personal World Model: The Library of Possible Selves. What if you could simulate, not just your future decisions, but the people you would become as a result?This isn't a prediction of what you will do. It's a generative model of your character latent space. Trained on your lifetime of data—your words, actions, physiological responses—it learns the deep patterns of your personality: your core values, your trauma responses, your capacity for change. Then, it can extrapolate. If you move to Tokyo, who do you become in ten years? If you forgive that person, what does your emotional landscape look like? If you pursue this obsession, where does it lead your soul?This Library is not a judge. It's a mirror of potential. You can walk its stacks, 'meeting' these possible selves. Not as cartoons, but as fully simulated consciousnesses, each with their own memories, regrets, and joys, all stemming from the pivotal choice-points of your life. You could converse with the version of you that stayed in the hometown, or that took the big risk, or that dedicated their life to art.The psychological impact is profound. It could cure regret, by showing you the hidden costs of the path not taken—the version of you that got the dream job but lost their family. It could also induce infinite paralysis, making every choice a act of existential murder, killing off infinite other potential yous. Or, it could lead to the ultimate self-acceptance: seeing your actual, realized self not as the 'best' or 'true' version, but simply as the one that happened, one thread in a magnificent tapestry of what could have been.This technology, of course, is a weapon. Governments could simulate radicalized versions of citizens. Corporations could simulate the most compliant consumer version of you. The 'Library' could be used not to liberate, but to optimize you for a role, guiding you toward becoming the most profitable, controllable self in the stack.My extensive, controversial conclusion is this: The 'Library of Possible Selves' will force us to redefine identity. We are not a static noun. We are a dynamic verb—the process of self-selection. The meaning of life becomes the act of curating your own library, of choosing which potential self to nurture into reality. And the ultimate act of love might not be accepting someone as they are, but browsing the infinite library of who they could be, and whispering, 'I will cherish any version of you that emerges. Your potential is my home.' In the end, we are not who we are. We are the gardeners of our own becoming, in a universe that has finally given us a map of the seeds we carry.This has been The World Model Podcast. We don't just model the world—we model the multiverse of the person listening right now. Subscribe now.