Babylon is one of the most powerful civilisations in the game and makes its extremly easy to beat anyone to a science victory thanks to the free great scientists when you discover writing and a 50% discount on great scientists. The other units of this civ also complement the science victory as both are defensive units, one a powerful archer and the other a powerful wall. These units allow the civ to heavily fortify its cities and concentrate on increasing and protecting its science output.

A much needed Civ if you want to win via science.

Easily one of the most overpowered civilizations in Civilization 5. As Nebuchadnezzar II, you get a great scientist at the discovery of writing, and thus get an awesome science boost compared to others civs(which leads to better chance at completing wonders etc). A good civ for higher difficulties because of the special unit (archer) and building (wall). This is THE civ for science victory.

This is a great Civilisation for anyone pursuing a Science victory.

Nebuchanezzar gives you a free Great Scientist & a 50% discount on further Grest Scientists.

Both the unique unit & building give you a defensive boost to fend off those trying to stop you.