In the modern world, even Antarctica has land claims on it. Some have multiple countries claiming ownership. The whole planet is pretty much covered. Obviously this didn't happen over night, since it's not like these nations have existed forever.
What is the most recent point that there was a decent, substantial piece of continental land (ie something worth living in, or had some kind of value, not some inhospitable Arctic island) that wasn't claimed as part of a nation/kingdom? (Assume tribal indigineous people "claimed" the areas they lived in even if they didn't found cities).
Basically, when was the point when the entirety of the continents had been incorporated/claimed by somebody, and what was the last place?
Not a historian, but I would like to point out that not all land is currently claimed. The multiple claims to Antartica don't cover all of it (there is a gap between the claims of New Zeeland and Chile) and there is that semi-famous patch of land between Egypt and Sudan that neither claims as theirs because they both have border claims that would give them a more valuable contested piece of land and the unwanted bit to the other.
Continental land
People "claimed" the areas they lived in even if they didn't found cities
You're talking about pre-history then - by 3200 BC (when "history" starts) the continents where all populated.
