Rome conquered, and assimilated foreign gods into their pantheon-- so you ended up with a huge mess of gods-- gods of hinges, gods of boxes, gods of constipation...who can keep track of who does what, when the pantheon's always changing? Which is exactly how I felt when I first read GotM (my constant thought was "There are awesome things happening here, but I have no idea wtf is really going on!"
But the ascendants are the important thing. The genius of a great man (or woman, I suppose) would live on after they died, and people would start to pray to their spirit. Eventually, they would be considered full-fledged gods. Julius Caesar was worshipped immediately upon his death. Same with Augustus. So I think you could say they ascended? Anyway, the ascendant system started to make a lot more sense to me when I thought of it being similar to the Roman system.
Other parallels:
- Legions, obviously. They have the same weaponry (shield & shortsword-- the Malaz use crossbows where Romans used javelins), same basic strategy. Both are considered finest fighting force in the world, and were the only reason the empire existed (and held together).
- Both recruited soldiers (even commanders) from lands they conquered.
- First emperor assassinated (Kellanved/Julius Caesar).
- Noble/common system in Malaz-- powerful houses of Nobles, resented by commoners. Same as Rome.
- Also, Rome had tons of cults for minor deities...like the Malaz legions had, prior to GotM.
There are probably others, too, but the ascendant one was the one I thought was the most interesting. It's like SE took Roman Empire, made some slight adjustments, and then made the mythology real.
Of course, I think the RE was remarkable devoid of Tiste Andii and floating fortresses, and their Soletaken were few and far between. Doubtful they ever came into contact with the Jaghut.
I'm obviously not saying that SE only borrowed from Rome, and not even that it's a bad thing to borrow. But I think the parallels are interesting.