This document provides a history of the commercial aircraft industry from its beginnings with the Wright Brothers to the current duopoly between Boeing and Airbus. It discusses key events like World War I and II and the emergence of jet aircraft that shaped industry development. It also analyzes factors that can affect demand for new aircraft like economic crises, government policies supporting Airbus, rising fuel costs, and terrorism concerns. Both Boeing and Airbus strategize around these factors through new plane models and technologies to remain competitive.