Atheists, agnostics, and sadly some Biblical scholars, claim the New Testament is not reliable or accurate.  However, when objectively compared with other ancient texts, deemed reliable by those same individuals, such as the writings of Pliny the Elder (61-113 AD), Plato (427-347 BC), Suetonius, (69-142 AD), Josephus (37-100 AD), Julius Caesar (63-44 BC), Livy (59 BC-17 AD), Tacitus (56-117 AD) and others, the New Testament is by objective, measurable standards, more reliable.  Why?  There are thousand more New Testament manuscripts than of any other ancient work.  Nearly complete manuscripts and fragments of the New Testament date to within a few decades or in come cases a few hundred years of the originals.  Manuscripts of other ancient writers are few, and 500 to 1,400 years after the original was written.