Significant developments in the history of the world that break was "This Changes Everything" within reason applying to everyday life.
AI Overview
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Some significant historical events that changed the world include: the invention of the printing press, the American Revolution, the Industrial Revolution, World War II, the Great Depression, the fall of the Berlin Wall, the Apollo 11 moon landing, and the COVID-19 pandemic, all of which significantly impacted society, politics, and technology on a global scale.
Socio-political organization, world travel, mass religions, and, in my opinion, the most significant?: "the personal information age."
Take everything before the internet and put it in the hands of people: Cellphone/Camera/Communication with its potential for nefarious uses, and life on planet Earth will not be the same as you probably realize.
Individuals' personal lives are exposed, government secrets are at risk, proprietary secrets are opened up, and Military capabilities and actions are no longer kept from ordinary people. There are no secrets anymore.