By moving from stupid to intelligent nanomachines, this final Mechanical Advance allows civilization to build <l:2,60>Angel-Nets<e> that increase people's <l:6,96>Happiness<e> and <l:3,44>Nanite Defuser<e> that eliminates all nuclear weapons from the game. They also enable a Civilization to <l:6,35>terraform<e> <l:5,9>hills<e>.