Dossier №250

2,015 AD

Nearly every country adopts the Paris Agreement to limit global warming.

This question uses 2015 AD as its sourced chronological anchor.

The accord created a framework for national climate pledges and periodic increases in ambition.

1,920 AD

The League of Nations formally begins work in the aftermath of the First World War.

This question uses 1920 AD as its sourced chronological anchor.

The organization pioneered collective diplomacy but lacked the participation and enforcement power needed to prevent another world war.

529 AD

Emperor Justinian orders the first official edition of the Corpus Juris Civilis in Constantinople.

This question uses 529 AD as its sourced chronological anchor.

The compilation reorganized centuries of Roman law and later became foundational to civil-law traditions across Europe and beyond.

1,500 BC

Large ceremonial centers associated with the Olmec tradition begin developing on Mexico’s Gulf Coast.

This question uses 1500 BC as its sourced chronological anchor.

Monumental heads, planned centers, and far-reaching exchange made Olmec communities influential in later Mesoamerican cultural histories.

292 AD

A Maya monument at Tikal records one of the earliest surviving Long Count dates.

This question uses 292 AD as its sourced chronological anchor.

The inscription shows how rulers situated political events within a precise, expansive calendrical system.