It's a famous quote in Gundam, and it's from Gundam Emissary Kshana F Kiyoi from Mobile Suit Gundam 00. In Mobile Suit Gundam 00 Season 1, Episode 19, Silly That (jokingly called Silly That because of its pronunciation and Kshana's occasional middle-agedness) utters this quote of the century when he strikes in his Noh Angel.

In 2307 A.D., due to the depletion of fossil fuels, mankind began searching for an entirely new form of energy - a giant solar power system consisting of 3 giant orbiting elevators. However, only a few of the world's major powers and their allies were able to share this energy source. The three superpowers and their alliances that own the three giant orbital elevators are the "UNICORN" centered on the United States of America, the "Alliance for the Advancement of Humanity" centered on China, Russia, and India, and the "AEU" centered on Europe. The "AEU" centered on Europe. Each of these alliances of superpowers has been engaged in a huge game of rivalry for the sake of their own prestige and prosperity. Yes, even as the wheel of history moves into the 24th century, humanity remains divided.