Sun Tzu said that, and I say he knows a little more about fighting than you do, pal, because he invented it, and then he perfected it so that no living man can beat him in the ring of honor!
Then he used his fight money to buy two of every animal on Earth, then he herded them onto a boat, and then he beat the living crap out of every single one.
And from that day forward, any time a group of animals are in one place it's called a zoo!
Source source source source sourcesourcesourcesourcesource: https://www.deviantart.com/chocolatechilla/art/Wreck-everything-423462193
