For Randy Mcdonald's "Communaute Globale" (
https://web.archive.org/web/20051228045350/http://www.ahtg.net/alterframe.html : see "Worlds of the ITA" in the lefthand box)
Although diverging from our world as early as the 17th century with the survival of New Amsterdam, this TL remained broadly convergent with our own until the revolutionary era in spite of the French success in holding onto Louisiana and Canada. After the non-event of the American revolution (postponed due to the continued Frenchie Menace), an alt-French revolution broke out in 1792, leading to the Age of Revolution, which lasted till 1836. Britain would be crushed 1805-1817, in what is referred to as "The humbling of England", and Napoleon became master of Europe west of a rump Brandenburg-Prussia and an isolated Russia. The Napoleonic dynasty would not last, however, a resurgence of radical republicanism overthrowing and guillotining Napoleon II, and defeating attempts at restoring the Old Order west of Bavaria.
A bunch of royals fled to the Americas, with the Bourbons ending up in Canada, the Braganzas (as OTL) in Brazil and the line of Sax-Coburg and Gotha settling in the northern British colonies. For a while George IV was the ruling of both the New England and Virginia colonies, but republican (and pro-slavery) forces came to the fore in the south, and Virginia went it's own way. Spanish America fell to revolution.
A new order arose in Europe, fiercely republican, economically leftist, and dedicated to the notion of the equality of all humans, regardless of gender or skin color. It would not be without it's teething pains, but by the end of the 20th century it had bloomed into a transnational political forum, economic union, and mutual defense league known as the Communaute Globale. (There is a common currency, the Occidental Franc). There is ambition to extend it to a world government, but the countries of Asia have been slow to join up, preferring where a strong confluence of interests exists to adopt a position of "association" with the communaute rather than full membership. A predominantly European and American organization, if with a strong presence in Africa, the communaute is sometimes referred to as the "Occident" or "Occidental Powers."
In opposition to the Communaute are the Autocratic great powers of Russia and Japan. Russian autocracy, bolstered by Orthodox religiosity and xenophobia, has managed to survive the ideological challenge, and given relative numbers (Russia's demographic transition was rather later than Republican Europe's) has been able to hold its own militarily, if losing some territory around the edges. Japan, OTOH,was forced open by the navy of Napoleonic France earlier than OTL, and responded with vengeful vigor as soon as Paris's attention was distracted by the decapitation of an Emperor. After the collapse of Qing China [1]Japan sought to make itself the leader of Asia, and in the 1950's the biggest war in centuries broke out, as Japanese efforts to extend its control led to a brutal war between Japan and several western powers led by France (retrospectively known as the Occidento-Japanese war) which soon expanded to the Americas, where the states of Virginia and New England tried to take advantage of the distraction to gain control of all the lands east of the Mississippi and south of the Great Lakes.
The allied nations were hampered in their efforts by the need to keep massive forces in Europe to keep the restive Russian giant at bay, and while after a horrendous bloodbath New England and Virginia were defeated in detail, Japan managed to pull off a negotiated peace which left eastern Siberia, Korea and Hawaii under the thumb of Edo. The limited victory and arguments about "who lost the war" led to political turmoil in much of the western world and a political rejection of the former establishment, leading to a renewed era of republican radicalism and the formation of a closer, more unified grouping of republican nations which would become in time the modern communaute.
It is in some ways a weaker block than the NATO/NAFTA/northeast Asian democratic-capitalist block of our world, if more widely spread. More fragmented and with no single "superpower" member, it is also less populous overall than the same area OTL. Some of the factors which slowed French population growth after the Revolutionary era (property laws, etc.) were duplicated, but more widely a commitment to universal education and human rights, raising the standard of living of the urban poor and peasantry, etc. led to an earlier demographic transition, and similar effects spread to the Americas and much of Africa. Settler colonies had fewer immigrants, the not-so-wretched masses often breathing fairly free at home, and colonization of the non-European world, without the racist convictions of our world, petered out at an earlier stage than OTL.
(Not that there wasn't a rise in "scientific" racism over the course of the 19th century. However, the levelling and universalist ideas of the Revolution, and the continued adherence to the Age of Reason notion of the perfectibility and unity of humankind helped act as something of an immunizing factor. Thinking in notions of inherently "superior" and "inferior" humans was anathema to many of the intellectual leaders of the revolutionary period.)
Rather more "indigenous" nations survived into modern times or managed to gain or (regain) independence, including Australian aborigines, which adopted cattle and sheep domestication and moved away from hunter-gatherer lifestyles (often, alas, at the expensive of other tribes which _didn't_)
Technology is advanced, although perhaps a bit weak compared to OTL in fields where economies of scale are important. Atomic weapons weren't invented until much later, and international treaties so far have kept them few in number. Computer tech and the biological sciences are in some ways more developed than OTL at this time, and there is a well developed Occidental "internet" (and a firmly firewalled Japanese Imperial one), although there is as yet no such things as "social media" (and if such is ever developed, it won't be the private property of a few corporate titans).
While democratic, this world is prone to political turmoil and violence, and even within the most developed nations protest and strikes and the occasional riot are seen as healthy phenomena, indicative of a populace politically active and ready to assert its rights. Multiple civil wars are currently under way in poorer and less democratic nations, and the division between the nations of the communaute - which in turn vary from constitutional monarchies with mildly social-democratic economies to authoritarian "neo-jacobin" republics and a couple states pursuing something like anarcho-socialism - and the Autocracies and other non-democratic states is sharp and uncompromising.
(Although generally more leftist than OTLs first world - especially OTL after the 1970s - capitalism flourishes in much of the world, only kept under enough control to prevent the formation of oligarchic capture of the levers of government. In some ways the market is rather freer in this world's north America than ours - it is not dominated by monopolies and near-monopolies, and there is much more competition both local and international.)
[1] The particular humiliations of OTL, such as the Opium War, were not duplicated, but China suffered as OTL from a population pushing the Malthusian limits and late dynastic ruler decay and pressure from Japan and Russia, and while the Republican nations weren't as rapacious towards China as the Great Powers of OTL, they disliked China's autocratic "old regime" even more, and vigorously spread revolutionary ideas in hopes of seeing it replaced by a more democratic state or states.