The realism rating is LAME AS HELL because what's the point of having secret societies if you're only going to have two of them, you might as well call them Democrats and Republicans, it doesn't even make sense to call them Assassins or Templars if they're descended from the first humans.
To be fair, if you have goals like "freedom for all" and "order in a cruel world" you could easily encompass other secret societies bases on those goals. The Turban secret societies (let's call them "sec soc" for simplicity's sake), for example were rebelling against imperialism so they'd be for the assassins. The triads were used to keep stability so they'd be templars.