I agree, of course. But the canon of Scripture was tested against the teachings of the Gospel and is consistent with it. Thus, while the author of the Gospel of Luke (who is also believed to be the author of the Acts of the Apostles) wrote in, maybe, 80-100 AD, the events he described would have occurred within the lifetime, and memory, of many then still living.
the events he described would have occurred within the lifetime, and memory, of many then still living.
Although I agree with your premise, the dating of Luke and Acts seem to be much earlier. Below is a link to the dating of the NT books as seen by a multitude of Biblical scholars. One piece of internal evidence we do have that Acts was a very early book is that it ends in Rome, but we have other evidence in Paul's epistles of his ministry continuing. Some of this touches on the external evidence of a third missionary journey.