Remnant

Remnant is a vast world that has been inhabited (though not continuously) for almost 100,000 years. Much of that history is lost to the ravages of time, but in the modern era its diverse peoples and societies have clustered around 4 (effectively 3) hegemonic powers: Atlas, Mistral, Vale, and, by courtesy, Vacuo, known collectively as the Kingdoms. For thousands of years the Creatures of Grimm limited the scope of civilization, and even after their disappearance constraints of technology and geography bounded the ambitions of even the most able conquerors. For most of Remnant's history power was concentrated in defensible city-states or well organized nomadic tribes. The Kingdoms as we know them came into their modern forms within the last millennia and only came into contact with one another in the last few centuries, during a period of expansion and imperialism that enveloped all the inhabited parts of Remnant. The Great War was the last and most devastating conflict of this era, costing countless millions of lives and leaving entire regions effectively depopulated, and its resolution would go on to define the subsequent political, economic and cultural framework which continues to this day. Contemporary dates are conventionally noted as 'Before the Great War' (BGW) or 'After the Great War' (AGW), with the decade of the war itself entirely defined by that event (1-10 GW). In its wake, the Vytal Peace Accords -colloquially known as the 'Vytal Treaty' or 'The Treaty of Vytal' - were symbolically ratified on the first day of a new year, despite negotiations having completed several weeks earlier, reinforcing the image of a complete reordering and renewel of global affairs. The Accords abolished the pre-existing monarchic systems of government and standardized a general democratic form of government:

All governments would be headed by an elected Council, composed of 5 seats.
3 'Councilors' would serve for staggered 6 year terms, with one seat coming up for election every 2 years. These Councilors were to be popularly elected by the Kingdom at large.
2 'Consuls' would be appointed by the Councilors on an annual basis to act as Chief Magistrates.
The holders of both offices were voting members of the Council, though custom dictated that domestic activity fell chiefly to the Councilors, while military and international dealings were overseen by Consuls.
'The Universal Declaration of Rights' had to be affirmed and upheld by all members and all citizens of signatory states were granted full legal protection by other signatories.
All signators would join a currency union, overseen by the Vytal Organization, which would also oversee trade and communication between the Kingdoms and outer territories.
All settlements outside of the designated cores of the Hegemonic Powers would be granted formal independence
The Island of Menagerie would be returned to the Faunus, who were also granted citizenship wherever they resided.

These Accords and their enforcement have radically homogenized much of Remnant's culture. The following flowering of technology that produced such innovations as the airship and the Cross Continental Communication Towers made transportation and communication between settlements cheap and easy. Living standards, life expectancy, literacy and economic growth expanded rapidly in the following decades. As the chief victor of the war, Vale became the model for most of Remnant's people; international business was conducted in Valean, and for illiterate swaths of the population education was conducted in Valean. As the language of commerce, diplomacy, higher learning and mass entertainment, Valean rapidly was adopted as the global lingua franca: many of the younger generations speak exclusively in Valean. For all its geographic and phenotypic diversity, Remnant has become a very uniform place: the overwhelming majority of human beings speak the same language (Valean) as a first or second tongue, use the Lien(Ⱡ) as their standard currency, live under democratic political institutions and communicate via the CCCT. Ease of migration means that it is not uncommon to find ethnic Mistrali living in the core of Vale, or Vacuans lounging in the heights of Atlas. But conflict continues. While no wars between the Kingdoms have occurred since the Vytal Accords: violent crises such as the Catamaran Crisis, the Faunus Rights Revolution and the Atlesian Civil War have demonstrated that warfare has not been eliminated. Many of the promises of the Vytal Peace have been... imperfectly implemented. Slavery has been abolished, but in the remote corners outside the Kingdoms reputable firms such as the Schnee Dust Company employ contractors with creative definitions of 'free labor'. Legal discrimination against Faunus is illegal, but private discrimination is not, and even legal equality has only been kept by force of arms, which has racheted up racial resentments even more. And while the outlands beyond the Kingdoms are nominally independent, the Kingdoms have an unspoken understanding about their various colonies, allies and protectorates, and are fully prepared to use military force to maintain that understanding, whatever the residents of the outlands might want.