Basically in my opinion, Rome can be considered as a relatively strong Civilization in some strict circumstances (such as play without declaring war). Last month, I tried to study and optimize the process of playing Rome. Mainly due to the change of the new Civics Tree and the development of the Three-Theaters method (a playing method on the Chinese forum), I played Rome within 165T for a peaceful science victory in deity level. Although not as good as Pericles can finish the game at the speed of 150T,it can be seen that Rome's all cities start with a monument, so it can have a high culture in the early stage. What's more, Bath can increase the number of major cities, and even Legion can defensive of AI's declaring war because of my settling aggressively.
Because the core of the play is based on building three theaters ASAP (to some extent, in order to cooperate with the application of 40 percent off regions), and Rome can go faster on the Civics Tree with rapid expansion , so it is more suitable for this approach. Therefore, it can play 165T SV results without war.