posted on Sep, 7 2012 @ 08:12 PM
The "world" doesn't actually know anything, being it is a planet and does not possess neurological capabilities in the sense that we consider
living organic beings to possess (if even greatly limited).
Let us assume for a moment he meant, "The people of the world", which is also incorrect because it infers a subjective understanding is objective
which it is not.
It is actually quite a controversial subjective issue, and many people disagree on various points. Many times these disagreements are legitimate,
other times perhaps not so much.
Some historians believe that Alexander of Macedon's army was the strongest, as it spread extremely quickly and won unprecedented victories.
Others may propose that it was Rome, or perhaps even the "Golden Horde", the Mongolian Empire, were the strongest.
Also in contemporary times, depending on the criteria and methodology employed, some may claim that China or Russia is "stronger" than the USA.
It really all depends on what criteria we are using, because as the criteria change so do the candidates for whom it may apply.