The emergence of DevOps in the late 2000s marked a transformative moment in how organizations develop, deliver, and maintain software. It began as a cultural shift—aimed at knocking down the wall between development (Dev) and operations (Ops)—and it has evolved into a robust set of practices, tools, and mindsets that push software delivery to be faster, more reliable, and more secure. Yet, like any major movement, DevOps did not arise in isolation. It was shaped by the frustrations of siloed teams, the rise of Agile methodologies, and the increasing customer demand for always-available, continuously updated digital products. This chapter explores why DevOps emerged, how it revolutionized software delivery, and where it still falls short in today’s complex, rapidly changing tech landscape—setting the stage for the transformations examined throughout this book.