6th Century B.C.E.

Colosseum

Republic established in ancient Rome

In the late 6th century BCE, the small city-state of Rome overthrew the shackles of monarchy and created a republican government that, in theory if not always in practice, represented the wishes of its citizens.

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Humans of ancient Greece invent the crane

The archaeological record shows that no later than c. 515 BC distinctive cuttings for both lifting tongs and lewis irons begin to appear on stone blocks of Greek temples.

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Sun Tzu writes the Art of War

The Art of War remains the most influential strategy text in East Asian warfare. It has a profound influence on both Eastern and Western military thinking, business tactics, legal strategy and beyond.

Change milestones from around the world

Good news for climate, justice, democracy, and more