Christopher Alexander examines why certain built environments possess more “life” than others. Central to his theory is the concept of “centers”—distinct, coherent parts within a larger whole that influence each other’s intensity. He argues that life can be objectively sensed and measured, supported by 15 fundamental geometric properties found in nature and traditional architecture. Alexander contends that these properties, which foster human well-being, have largely vanished in modern design, impacting our connection to built spaces.