Building a design system in React is about more than just a component library; it is about creating a single source of truth for your UI logic and visual identity. With over 25 years of experience in software development and as the creator of CoreUI, I’ve architected dozens of design systems that power enterprise-level applications. The most efficient approach involves using design tokens for constants, the React Context API for theming, and a component-driven architecture to ensure modularity. By following these principles, you can create a robust system that improves both developer velocity and design consistency across your organization.