Unfortunately the seven virtues of rule have changed in the AE and now it's love and not fertility.
Xin's idea was to base an empire (actually the ruling of an empire) on the same principles he has based his form of arcane magic and those principles are the seven virtues of rule. Keep in mind that at the time all that Xin had to base his empire were himself, his disciples, any azlanti who had followed him and the savage humans (mostly shaonti and varissans). In addition the reason he wanted to make his own empire were (at least partly) because he was so sick with the way that things worked back in Azlant, he wanted to create a more free nation, a more thinking nation etc.
The fact that he also ended up being slightly controlled by aboleths, growing so paranoid that he ended up living alone with his clockworks, being assasinated by his students who took his seven virtue of rule and corrupted/twisted and turned them into the seven sins of rule is another matter altogether.