Rome lasted a really long time.
“Sallust’s complaints about Roman decadence – which date to the first century B.C. nearly five centuries before its ‘fall‘ – are often quoted as somehow explaining Rome’s eventual demise, but Rome wasn’t even done expanding at that point. “
https://acoup.blog/2020/01/30/collections-the-fremen-mirage-part-ii-water-spilled-on-the-sand/