Why React State Management Changed — setState > Redux > React Query

TL;DR — React state management evolved from class-based local state → global stores → hooks → lightweight stores → server-state tools. Today the answer is simple: use the right tool for the right type of state. 👉 The biggest mistake developers made for years: treating server state like client state. Introduction Every React developer eventually hits the same frustration: "My state is getting out of control. Components need data three levels up. API calls are scattered everywhere. Nothing stays in sync." Over the years, the React community developed several solutions to address this problem. Some worked well. Some created new ones. Here is the honest timeline: this.setState — class components (2013) ↓ Redux — centralized global store (2015) ↓ Context API — stable, built-in (2018) ↓ useState / useReducer — hooks era (2019) ↓ Zustand / Jotai — lightweight global state (2019-2021) ↓ React Query / SWR — server state (2020) ✅ In this blog, we'll walk through each stage — not just what each