KERALA RISING · FROM EXPORTING PEOPLE TO EXPORTING IDEAS 4. Build it once, use it everywhere Instead of building one-off systems for each department, the state builds reusable civic-tech infrastructure once, and configures the same components for different use cases. The same stack underneath cleanliness is the stack underneath road safety and water security. The reason a model society is now affordable, and not just desirable, comes down to a single idea: build the hard part once, and reuse it for everything after. This chapter describes what the institution actually builds, the shared foundation that every promise in Part Two stands on. A state that pursues seven civic goals separately pays seven times over for the same plumbing, identity, verification, audit, payments, dashboards, field operations, and ends up with seven things that cannot talk to each other. A state that builds that foundation once pays for it once and then configures it, again and again, for almost nothing. The saving is not incremental; it is structural, and it is the reason the whole ambition fits inside a budget. Chapter 16 puts numbers to it. The components The stack is a set of reusable civic components. A program is a configuration of these components plus one new verified action and one partner department. 77