Pull the Atlas back to its widest view and something strange sits at the left-hand edge. The Greco-Roman band opens with Thales in Miletus. The Indian band opens with the Buddha and Mahāvīra. The East Asian band opens with Confucius and Laozi. They are stacked almost vertically — which is to say, they are contemporaries.
Thales is usually dated to the early 6th century BCE. The Buddha and Mahāvīra belong to roughly the same stretch of the 6th and 5th. Confucius was born around 551 BCE. Within a window of a century or two, in three regions with no meaningful philosophical contact, people started doing something recognisably similar: asking what the world is made of, what a good life consists in, and what authority tradition actually has.
What they shared
Not doctrine. The answers have almost nothing in common. Thales said the world was water; the Buddha declined to answer metaphysical questions of that kind at all, on the grounds that they do not conduce to liberation. Confucius was preoccupied with ritual, family and the ordering of a state; Laozi with the futility of exactly that kind of effort.
What they shared was a move, not a conclusion — the step of treating inherited explanation as something that could be questioned rather than simply transmitted. Before Thales you explain lightning by naming the god who threw it. After him you look for a principle in the thing itself. That shift happens, independently, in three places.
Each also produced the second thing a tradition needs: students who disagreed. Thales is followed by Anaximander, who rejects water for the boundless. Confucius is followed by Mencius and then Xunzi, who take opposite views on whether human nature is good. The Buddha's followers split into schools that spend centuries arguing about what he meant. A single thinker is an event; a thinker plus a dissenting student is a tradition.
The explanation problem
Karl Jaspers named this period the Axial Age and it has been argued over ever since. The candidate explanations are mostly material: iron tools and agricultural surplus, the rise of coinage and markets, literacy, cities large enough to support people who did not farm, and — the most persuasive to my mind — political fragmentation. Miletus, the Ganges basin and the Chinese states of the period were all regions of competing polities rather than single stable empires. Competing courts need advisers, and advisers with rival patrons can afford to disagree in public.
None of this is settled, and some historians reject the framing entirely, arguing that the "simultaneity" is an artefact of how loosely we date these figures and how selectively we choose them. That objection has force. Our dates for the Buddha move by a century depending on which tradition you follow, and Thales survives only in reports written centuries after his death.
What a map can and cannot do
This is where a visualisation earns its keep and also where it misleads. Laying the traditions out as parallel bands on a single timeline makes the convergence immediately visible — you cannot look at it without noticing. That is a real service; the standard Western telling, which starts at Miletus and does not mention that Confucius was alive, obscures it completely.
But the same picture quietly implies a connection that the evidence does not support. Nothing flows between those bands in the 6th century. The influence ribbons that eventually cross them — Greek thought reaching Islamic philosophers, Indian and Chinese Buddhism meeting — come much later.
So read the opening of the Atlas as a coincidence with a plausible material explanation, not as a single event with three branches. The most interesting fact about the beginning of philosophy is that it has no single beginning.