I think it's generally accepted amongst fandom that the Federation was in it's peak early to mid 24th century. But what about Starfleet itself? I think this would be the 23rd century, a couple of reasons below: 1) The TOS Enterprise always seemed to easily best the equivalent ships from rival powers (with the exception of Balance of Power), even when encountering multiple enemy vessels they seemed to escape with no real damage. 2) We don't really see old looking ships (except the Enterprise itself in WoK) in the 23rd century. 3) Designs from this era are still well in use 100 years later (Oberth, Miranda, Excelsior etc). What are your thoughts?