From a scientific perspective, "where it all began" refers to the Big Bang , tracing the origin of everything from tiny atoms to vast galaxies. 2. Music & Pop Culture

In a macro sense, the phrase often refers to the foundations of modern society and the universe:

The ancient site of Uruk (Warka) in southern Mesopotamia is recognized as the starting point of urbanism, housing up to 80,000 people by the fourth millennium BC.