Explore a groundbreaking lecture on applying modern scattering theory to gravitational wave calculations. Delve into advanced concepts like color-kinematics duality, generalized unitarity, and double-copy relations between gauge and gravity theories. Discover how these cutting-edge ideas from particle physics are revolutionizing the binary black hole inspiral problem within the post-Minkowskian framework. Examine new results at the 3rd and 4th post-Minkowskian orders, showcasing the power of this innovative approach in pushing the boundaries of gravitational wave research.