While the authorship of Joshua is in question, there is ample evidence to show that Joshua could have
written the book during his time and no later than 25-30 years of his death (1400 BC).
1. Extrabibilical sources such as the Jewish Talmud states that Joshua wrote the book with his death
recorded by Eleazar son of Aaron and whose death in turn, was recorded by his son Phinehas.
2. Internal evidence reveals historical details consistent with an early authorship.
Joshua is recorded as the author (Josh 8:32; 24:26).
He wrote there on the stones a copy of the law of Moses, which he had written, in the
presence of the sons of Israel. (Josh 8:32)
And Joshua wrote these words in the book of the law of God; and he took a large stone
and set it up there under the oak that was by the sanctuary of the LORD. (Josh 24:26)
Joshua records that Rahab was still alive (Josh 6:25).
However, Rahab the harlot and her father's household and all she had, Joshua spared; and
she has lived in the midst of Israel to this day, for she hid the messengers whom Joshua sent to spy out
Jericho. (Josh 6:25)
Joshua recorded the background to the Gibeonites who provided wood and water for the tabernacle "to this
day" (Josh 9:27) until later during the Israelite monarchy when King Saul killed them (2 Sam 21:1-2).
But Joshua made them that day hewers of wood and drawers of water for the congregation
and for the altar of the LORD, to this day, in the place which He would choose. (Josh 9:27)
Now there was a famine in the days of David for three years, year after year; and David
sought the presence of the LORD. And the LORD said, "It is for Saul and his bloody house, because he put the
Gibeonites to death." So the king called the Gibeonites and spoke to them (now the Gibeonites were not of the
sons of Israel but of the remnant of the Amorites, and the sons of Israel made a covenant with them, but Saul
had sought to kill them in his zeal for the sons of Israel and Judah). (2 Sam 21:1-2)
Joshua records who were the people of Sidon which was an important and wealthy port city of Phoenicia
(Josh 13:4-6) until it was conquered by Tyre in the 12th century BC.
to the south, all the land of the Canaanite, and Mearah that belongs to the
Sidonians, as far as Aphek, to the border of the Amorite; and the land of the Gebalite, and all of Lebanon,
toward the east, from Baal-gad below Mount Hermon as far as Lebo-hamath. All the inhabitants of the hill
country from Lebanon as far as Misrephoth-maim, all the Sidonians, I will drive them out from before the sons
of Israel; only allot it to Israel for an inheritance as I have commanded you. (Josh 13:4-6)
Joshua records the Jebusites as occupying Jerusalem (Josh 15:8; 18:28) until King David captures it in
the eighth year of his reign (2 Sam 5:6).
Then the border went up the valley of Ben-hinnom to the slope of the Jebusite on the
south (that is, Jerusalem); and the border went up to the top of the mountain which is before the valley
of Hinnom to the west, which is at the end of the valley of Rephaim toward the north. (Josh 15:8)
and Zelah, Haeleph and the Jebusite (that is, Jerusalem), Gibeah, Kiriath; fourteen cities
with their villages. This is the inheritance of the sons of Benjamin according to their families. (Josh 18:28)
Now the king and his men went to Jerusalem against the Jebusites, the inhabitants of the
land, and they said to David, "You shall not come in here, but the blind and lame will turn you away";
thinking, "David cannot enter here." (2 Sam 5:6)
Joshua named the Canaanite cities by their archaic names: Balaa for Kirjanth-jearim (Josh 15:9),
Kirjanth-arba for Hebron (Josh 15:13), and Kirjath-sannah for Debir (Josh 15:49).
From the top of the mountain the border curved to the spring of the waters of Nephtoah
and proceeded to the cities of Mount Ephron, then the border curved to Baalah (that is, Kiriath-jearim).
Now he gave to Caleb the son of Jephunneh a portion among the sons of Judah, according
to the command of the LORD to Joshua, namely, Kiriath-arba, Arba being the father of Anak (that is, Hebron).
and Dannah and Kiriath-sannah (that is, Debir), (Josh 15:49)
Joshua indicated that the Canaanites were in Gezer "to this day" (Josh 16:10) until they were captured and
routed by the Egyptians during King Solomon’s time (1 Kings 9:16).
But they did not drive out the Canaanites who lived in Gezer, so the Canaanites live in the
midst of Ephraim to this day, and they became forced laborers. (Josh 16:10)
For Pharaoh king of Egypt had gone up and captured Gezer and burned it with fire, and killed
the Canaanites who lived in the city, and had given it as a dowry to his daughter, Solomon's wife.
(1 Kings 9:16)