Human

History
At the dawn The humans are descendant of the vrykul. Around 30,000 years ago, the gods "abandoned" the vrykul, and a certain time after that, their children were born "weak and ugly." King Ymiron ordered all those children to be killed, but not all parents obeyed this order and instead hid their children to grow up far away from Northrend. The earliest known history indicates that they may have been called the Azotha. Between the finding of magic from the Well of Eternity and the Sundering (approximately 20,000-16,000 years ago), the Azotha became the humans. They were nearly as savage as their foes among the trolls, and both groups wandered the land battling each other while trying to plant the seeds of their cultures. The trolls actively hunted these humans. These nascent humans saw the kaldorei as shadowy figures with god-like powers, but were sometimes captured and used as slaves by them. Centuries before the War of the Ancients, the bear Ancients Ursoc and Ursol, befriended many generations of humans and kaldorei and were beloved in return. When the night elves fought the demons during the War of the Ancients in their lands, the humans and trolls retreated deep into the wild. Groups of endangered humans or night elves were guided away from the doomguard by Aviana disguised in mortal form. After the Sundering, the human tribes teetered for thousands of years on the brink of extinction as their numbers were winnowed by an increased struggle for resources. They persevered, exploring the continents in search of game, wood, and refuge. These years were nearly the race's last, as it eked out sustenance from the ashes and the aftermath of the destruction until the Sun returned. The surviving tribes of humans sent out intrepid bands to explore the reborn world and to find their long-lost brethren. Slowly, trade routes were established across the revitalized world. These early humans may have had access to divine spells through worship of the Old Gods or early cults that would become the Church of the Holy Light. Humans joined the forefront of Azerothian history during the Troll Wars. With the help of the high elves, humans learned magic and waged a bitter war against the trolls that once spanned the entire length of the Eastern Kingdoms. Eventually humanity won against the trolls, and they built the nation of Strom and later the empire of Arathor. Arathor gradually expanded and splintered into seven separate, sometimes warring empires for over 1,200 years until the creation of the Alliance.

Humans that arrived through the Portals
Shortly after Vamir destroyed everything, two portals opened up into different areas and Civilization started being built around them.

Xen'Drik's Humans

Faerun's  Humans