All books were written before AD 100, 25 of the 27 books were quotes by early church fathers between 95-100
Jude (Jesus' half brother) was dead by 100 and 2 John (3 John was quoted)
If written after 70AD, they would have likely mentioned the fulfillment of the destruction of Jerusalm and the temple
Paul, who wrote much of the New Testament, lived until the mid-60s
Is the gap between the event too wide (15-40 years)?
Why is there not more written?