Summarizing world history into a 250-page book is not an easy feat, yet that's what Scott Powell tries to do in his book “The history of Now”. He approaches the subject through a "present-centric" method, meaning that he starts with what the world looks like today and then tries to map out the major world events that have lead to this current moment (the book was published in 2018). The book fits into the category of so-called "big history". It's a different take on the subject, and I think it's a useful and interesting approach. Compared to more narrow history books, its lessons enable you to shine a new light on current world events and their deeper causes.
Starting with how the world looks like today means starting with the fact of the supremacy of the United States of America in world affairs. So how did the world come to be this way? What caused America to take this position and what's now causing it to recede more and more from its "Americanistic" style of world policing, and perhaps more pertinently, what will the be consequences of this?
In order to paint a picture of our history - literally - Powell uses various line diagrams that visualize key events in world history starting from a few thousand years BC until the present. To avoid getting bogged down in largely insignificant events or inconsequential tracks of history, he's chosen to outline the progression of the major world powers or regions: the US, Europe, Russia, Middle East, and China. That's really all that matters in terms of world history if you're trying to understand why the world looks like it does today. The timelines look something like this:
Although he builds a larger and more complex map of our shared history throughout the book, connecting various regions and countries together over time as their histories intertwine, the starting point has a few key dates for each of the historical tracks:
The founding of the United States in 1776, which is a result of the "discovery" of the Americas in 1492 by Columbus. Columbus, of course, was a European.
The birth of Europe (and its collection of disjointed nation-states) happened in 476 AD with the invasion of Rome by the Germanic ruler Odavacar, deposing the last Roman emperor Romulus Agustus.
But European and western history has its roots in Ancient Greece starting in ~508 BC with the birth of democracy in Athens by a legislator called Cleisthenes.
Modern Russian history can be said to have started in ~862 AD with the founding of a nation called the Kievan Rus, by a Viking conqueror named Rurik, whose descendants merged with the Slavs. Russia is partly European but also quite distinct from it, most notably due to its long isolation from other European peoples until just a few hundred years ago.
The "modern" Middle East had its start after the founding of Islam by the prophet Muhammed in ~622 AD and spread aggressively throughout the region, all the way to eastern Europe and Southeast Asia during the next decades to hundreds of years.
Yet the Middle East and the pre-Islamic nations sometimes called the "cradle of civilizations" can be traced back to the birth of Ancient Egypt by a semi-mythical emperor called Menes (or Narmer) ~3000 BC.
Tying all these four major blocks of the world together, of course, is the birth of Jesus Christ and Christianity in 4 AD (he probably wasn't born in year 1).
Separate from the rest of the world but still very consequential is Chinese history, which as you can see from the thick line in the diagram, has a long united history of emperors and dynasties starting ~2200BC with the Xia dynasty (or perhaps even earlier).
With these starting points, he then tries to explain the various regions' current predicament. The rise of the West and America, and the rest of the world's "subordinacy to the West" and the natural opposition to this subordinacy. "Post-communist Russia"; why did Russia not integrate with the rest of the world/the West after the fall of the Soviet Union? "Post-Maoist China"; how is it that China has reemerged as a strong power after decades of poverty and even centuries of relative obscurity? "Supranationalist Europe"; why did Europe with its long history of inter-national warfare and conflict manage to come together under a common union (which had been attempted and failed many times since the fall of the Roman Empire)? "Islamic Culture in the America-centric age"; how is it that these two cultures collided so violently in the past few decades? (Hint: it's not because the US tried to "take all their oil.")
So where do South America, India, and other cultures/nations of the world fit into this picture? It's not that they are uninteresting or unimportant, but that when you're trying to understand the current state of the world (and America's supremacy in it), these other histories are just not very consequential. In other words, the history of these nations as separate tracks of history don't have a lot of explanatory power or don't add enough detail to the overall history of the 5 major power or blocks, that isn't already accounted for.
Nevertheless, I doubt a Chinese historian would ever write a book on world history like this. And I can't help but assume that there's some sort of natural bias that creeps in throughout Powell's analysis. Perhaps this is more of an American-centric history than a present-centric history? In any case, I find his general arguments convincing and helpful in understanding the larger trends of world history. Another reviewer of the book said that this is like the 80/20 approach to history, which is exactly right. There are so many different kinds of stories, events, and narratives that make up human history from the past ~5000 years, but in reality, only a handful of cultures have made a really broad and consistent impact on the history leading up to the present. Understanding these broad trends and memorizing a few key anchor dates of history (2200BC, 508BC, 476 AD, 622 AD, 1492 AD, 1776 AD, etc) is a very useful way of making sense of the world.