Grant Sanderson

Grant Sanderson has done something that generations of math teachers attempted and failed: he has made people genuinely excited about linear algebra. Through 3Blue1Brown, his YouTube channel named after a personal eye color quirk, Sanderson uses breathtaking custom animations to reveal the visual beauty hidden inside mathematical concepts that most people experienced only as abstract symbol manipulation in school. His work has fundamentally changed how millions of people relate to mathematics.

The secret weapon is Manim, an animation engine Sanderson built himself. Unlike generic motion graphics tools, Manim is purpose-built for mathematical visualization. It allows Sanderson to create animations where vectors rotate, matrices transform space, and calculus concepts unfold with a visual precision that static textbook diagrams cannot approach. He open-sourced Manim, and it has since been adopted by math educators around the world, spawning a community-maintained fork that extends his original vision.

His series on the Essence of Linear Algebra is widely considered the single best introduction to the subject ever created. But what earns Sanderson a place in the AI category specifically is his neural network series, which provides the clearest visual explanation of how deep learning actually works. By animating the flow of information through network layers, the geometry of gradient descent, and the high-dimensional landscapes that optimization algorithms navigate, he gives viewers an intuition for AI that reading research papers alone rarely provides. Many working AI researchers credit these videos as the moment the field truly clicked for them.

Sanderson's Summer of Math Exposition initiative shows his commitment to the broader ecosystem. Rather than hoarding the spotlight, he created an annual contest that encourages others to produce excellent mathematical content, providing a platform for emerging math communicators. It is a generous, community-building impulse that reflects his core belief: the world does not need more math anxiety -- it needs more people who can show how beautiful mathematics actually is.