The ancient Greeks had been tackling optimization problems since at least the 3rd century BCE, setting the foundation for modern AI.Gradient descent, an algorithm rooted in ancient mathematical principles, plays a crucial role in how neural networks learn.It is based on the intuitive idea of following the steepest path and has been used in various optimization techniques throughout history.The ancient Greek concept of the 'method of exhaustion' and the continuous refinement of approximations is an early form of gradient descent.