I've played my first real game after reading the manual and faq and am wondering. If I mind my own business in Rome will these behemoths I see growing in the east eventually come for me? I mean Egypt and the sele's? I'd rather not war monger just to stay alive. I'm enjoying political intrigue alone at the moment.
You can expect the blobs to come for you soon or later, of course. Also the Sels often name themselves the protectors of the Greek world, so they can and will intervene in your attempts to annex the greek minors.
But if you really like intrique you can keep them busy with their own internal problems and help triggering civil wars in their empires.
Just be sure to:
a) Keep their ruler popularity at zero using smearing.
b) Keep their heir apparent popularity zero. This is possible once he hits age of 16, because minors are kinda immune to smearing.
c) Keep the pretenders loyality at zero.
d) Keep their generals loyality at zero.
e) Keep their governors loyality at zero. You should be ready to annex the possible regional country declaring independence here.
This implies you need to conduct intriques almost monthly, of course.