Human

Overview: The humans are the most populous and the youngest race in Azeroth. The humans have become the de facto leaders of the Alliance, with their youthful ambitions and resilience. I got this off of wowhead, hope you like it!

Capital City:The human seat of power is in the rebuilt city of Stormwind City.

Starting Zone: Humans begin questing in Elwynn Forest.

Classes Available: Death Knight, Hunter, Mage, Paladin, Priest, Rogue, Warlock, Warrior. Monk

Mounts: Katie Stokx sells armoried ponies in Stormwind, and Corporal Arthur Flew at the Argent Tournament has a few distinct models.

Racial Traits:
 * Diplomacy: Reputation gains increased by 10%.
 * Every Man for Himself: Removes all movement impairing effects and all effects which cause loss of control of your character. This effect shares a cooldown with other similar effects.
 * Mace Specialization: Expertise with Maces and Two-Handed Maces increased by 3.
 * Sword Specialization: Expertise with Swords and Two-Handed Swords increased by 3.
 * The Human Spirit: Spirit increased by 3%

Lore
Not much is known about human ancestry except that they were descendant of vrykul. Around 15000 years ago after the Titans leave azeroth the children of vrykul were born "weak and ugly" like a human baby,except that obviously human baby is cute. but to barbaric vrykul, strength is beauty. thus the weak is ugly.

King Ymiron ordered that these aberration to be killed to keep the bloodline of vrykul "pure'. But some vrykul parents disobeyed this order and hid their children far away from Northrend. From here it is believed that these vrykul children is known as the Azotha, a race that has connection to the Titans. However between 14000-10000 years ago, the Azotha converted into the human. why and how is still unknown.

The human race were once a tribal race. But Thoradin, the leader of Arathi tribe unite all the tribes and founded the Kingdom of Arathor, the first human empire to combat the forest trolls of the Amani Empire in the Troll Wars. The capital city of this empire is the Strom city. With help from the high elves of Quel'Thalas, they win the war. During these periods the human were thought to use magic by the high elves. After the trolls were defeated, the Arathor Empire begin to fracture. Eventually the empire was divided into many kingdoms:

Dalaran: Founded by the mages that dedicated themself to study the use of magic.

Gilneas: A kingdom ruled by Genn Greymane, later fall into worgen curse.

Kul Tiras: An island nation west of Khaz Modan founded by Daelin Proudmoore, father of Jaina Proudmoore.

Alterac: Situated at Alterac Mountains. Destroyed by Stromgarde under Thoras Trollbane leadership after the betrayal of Aiden Perenolde, the king of Alterac.

Stromgarde: The remaining royal citizen and defender of Strom. After they lost their capital city to the Syndicate and ogres they retreat to a base operation at Refuge Pointe. The remaining members of this nation formed the League of Arathor Lordaeron: Founded by once the lords of Strom, who leave Strom to the fertile lands of the north. Once ruled by the Menethil family. But succumbed to plague of undeath and the betrayal of Arthas Menethil. The ruins of this nation is now occupied by the forsaken ruled by Lady Sylvanas Windrunner . Kingdom of Azeroth (Stormwind): The descendant of the Arathi tribe bloodline decided to move to the south and founded the Kingdom of Azeroth, also known as Stormwind. This kingdom is ruled by the House of Wrynn since then and the capital of this nation is known as Stormwind City. After the first war, Stormwind City is almost destroyed by Orcish Horde. The survivors of the war then rebuilt the city and named it New Stormwind although it usually called as Stormwind. Now ruled by King Varian Wrynn

That is some of the Lore on Humans, I saw somone comment it on Wowhead, I looks through it and it looks right to me. Tell me if you see anything wrong.