World History on Khan Academy: From the earliest civilizations to the modern world, geography, religion, trade, and politics have bound peoples and nations together — and torn them apart. Take a journey through time and space and discover the fascinating history behind the complex world we inhabit today.
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
In our study of world history, we
have looked at many different empires.
And several of them are depicted on this map right over here.
We spent a lot of time on the Roman Empire.
In the highlighted yellow, you see the Roman Empire
at roughly its maximum extent.
And on this timeline, you see the Roman Kingdom, and then
the Roman Republic, and then the Roman Empire,
which ends in the 5th century, although the Eastern Roman
Empire, the Byzantine Empire, continues on for roughly
another 1,000 years.
Now, we also have depicted here a significant Persian Empire.
You have the Parthian Empire.
And they were preceded by the Seleucid Empire.
And they were succeeded by the Sasanian Empire.
But I have the Parthians depicted here
on the timeline and on the map.
I also show Han China, both the Eastern and Western Han
dynasties you can see on this timeline as well.
And in India, I show the Maurya Dynasty on the timeline.
I don't depict it here on the map.
But on the map, I show the Kushan Empire.
And I also show it on the timeline.
Now, the reason why I wanted to pick these empires
at this specific time in the world
is to highlight the fact that they weren't operating
in complete isolation.
In fact, as we get to the 2nd and 1st century BCE,
especially as we get into the Common Era,
we start seeing a significant amount of trade
and interaction between these empires.
Not to say that there wasn't trade and interaction
before that time, but it started to get accelerated.
And to a large degree, it got accelerated
because you had these contiguous empires that, at least
within their borders, were able to provide
some level of stability for someone
to travel across roads or travel across borders.
And so you start to see the emergence
of these trading networks.
In red, you see trading roads or paths in red.
And in blue, you see those paths by sea.
And this isn't even comprehensive.
And even what I showed on the empires,
there were many other smaller kingdoms
that also existed in the world
that I just don't have depicted here.
But what this contiguous block of empires allowed
is for the trade of goods and ideas.
And sometimes, collectively, the routes
that were used for this trade is referred
to as the Silk Road or the Silk Roads,
or really, you could say the Silk Routes.
And so it's a collective number of paths
that people used to trade things.
Now, why call it silk?
Well, it all boils down to silk being a major commodity
of trade at this time period.
So if you wanna think about the different things
that were traded around the world,
this is just a sample of it.
Silk, which comes from cocoons of these silkworms
that eat mulberry leaves, was considered a sign of wealth.
It was considered the finest cloth.
And China had a monopoly on how to make silk
for many hundreds of years,
even after the period that we were talking about right here.
So you can imagine around the world,
people were interested in getting access
to that Chinese silk.
But silk wasn't the only thing that was being traded.
In fact, in order to trade,
you need to give something in exchange for even that silk.
One of the Chinese motivations for trading with others
is having access to horses.
Horses were valuable not just for transporting goods,
but also in war, especially fighting
some of their northern enemies who had access to horses.
They also were able to get gold from Europe,
able to get cotton from India.
In Europe, you also had other manufactured goods.
So you had this fairly vast trading enterprise
emerge between these different parts of the world.
And to be clear, some of the things that were traded
allowed or facilitated the trade itself.
I mentioned horses were a source of transportation,
but camels in particular
were very powerful sources of transportation,
especially across Central Asia
and as you get into the Middle East and Africa,
because you have these large swaths of desert.
Camels could not only carry a lot,
but they had a lot of stamina
and they did not have to stop for water as frequently.
In a lot of world history,
we focus on the large non-nomadic empires
like the Roman Empire and Han China.
But as trade became more important,
especially as you go through Central Asia,
you could imagine that many of the people
who were very good at trading,
who were good at moving things,
were people who were good at moving themselves,
in particular, the nomadic people in Central Asia.
Many of their cities along these trade routes
became more and more wealthy and more and more powerful.
Now, as I mentioned,
goods were not the only thing
that were transported along these routes.
One of the not-so-good things was the spread of disease.
So in the historical record,
we have two major plagues in Rome during the Roman Empire
and we believe these plagues were smallpox,
although some people believe it might have been measles.
And it is believed that it came from traders.
It came from Asia, from the Middle East.
And these were significant plagues.
And the reason why we think that it was due to trade
is that there's some evidence in Han China
during this first plague of similar symptoms,
of a similar plague.
But it really affected Rome.
In these plagues, it's estimated that
as much as 10% of the population might have died.
In certain cities, it might have been 25,
30% of the population.
Some historians even point to these plagues
as destabilizing the Roman Empire.
And this is a theme that you'll see often in world history,
where if you have a population
that doesn't have exposure to something, say smallpox,
and all of a sudden,
they encounter a population that does have exposure,
well, that smallpox might wreak havoc.
But it wasn't just disease.
You also have the spread of ideas and technology
and religion.
And the two religions that perhaps benefited
the most from the early trade along the Silk Route,
or the Silk Roads, were Christianity and Buddhism.
And Buddhism in particular was very appealing
to many of these Silk Road merchants.
The Kushan Empire in particular
started to significantly spread Buddhism.
In previous videos,
we talk about Ashoka sending missionaries.
But the Kushan Empire helped spread Buddhism
into China and into the Far East.
So what we talked about in this video
was the very beginning of the Silk Road
as we get into the first few centuries BCE
or the first few centuries of the Common Era.
But as we'll see,
the Silk Road will continue on for many hundreds,
or really, over 1,000 years.