That is, in 3,400 years of documented history. Obviously, if you think back to before man set foot on this planet, there was probably exclusively what would today qualify as peace.
It certainly emphasizes the plight of those out to stop wars without violence, because if we’ve learned anything from our history, it’s that attempts at world peace aren’t being tried at hard enough. The Edo Period in Japan is notable for being a period of peace that spanned 255 years.
During the Edo Period, Japan was ruled by the Tokugawa family. The Tokugawa family ruled by enforcing strict social orders, isolationist foreign policies, and by promoting the arts, culture, and an increase in protection of the environment.
Pax Romana is also known for being a long period of peace during the 1st and 2nd centuries CE. The Roman Empire maintained this period of peace established by Caesar Augustus for about 207 years.
Throughout the histories of all countries there are periods of peace like these, but the occasions where no countries have been in war in documented history total up to only about 250 years.