Gnomes returned to the surface right after the end of the God Wars

Aside from a few settlements in the Kharidian Desert and the refugee town of Burgh De Rott (Meiyerditch, although being the largest city with human population at that time, was already ruled by Vampyres by then), most humans in the beginning of the 4th age had abandoned civilization due to destroyed settlements and lived in barbaric tribes. The major exception to this was the city of Saranthium, but this was eventually wiped out. As the age progressed, they started to build new and permanent settlements, some of which turned into mighty cities by the late Fourth Age, thus allowing humans to become the dominant race in Gielinor by the end of the Fourth Age. Humans also attempted to recolonize the Wilderness, but were not successful. Humans would not have become dominant, however, if it were not for the discovery of Rune Essence.

Gnomes returned to the surface right after the end of the God Wars, where they found their settlements destroyed. Between the 3rd and 5th centuries of the Fourth Age, gnomes were forced to hide from barbaric human tribes, avoiding extinction. Shortly after that, the Grand Tree was planted and gnome civilization and technology began to thrive.

Dwarves remained under the surface during the Fourth Age. During that time, they discovered a huge cavern where they built Keldagrim. After the city’s foundation, most of their magical powers were somehow lost, allowing them to only cast Superheat Item. During the rule of King Alvis, the Consortium, which quickly became a ruling organization in Keldagrim, was founded; by around the year 1650, after King Alvis’s death, the Consortium ruled the Dwarven Realm entirely. Due to their lack of magical abilities, the technology of dwarves had become very advanced by that time. By the end of Fourth Age or at the beginning of Fifth Age, they started making first contacts with the surface once again after a few thousand years.Runescape Gold.

Imcando dwarves emerged much earlier and retained at least some contact with the surface world during Fourth Age. However, all but 2 Imcando dwarves were slaugtered by barbarians, Thurgo being the most commonly known.

Elves did not remain enclosed in Tirannwn during the Fourth Age. In the early Fourth Age, they ruled large areas of modern day Kandarin for at least part of the age, where they taught humans and lived peacefully. This continued until the Iorwerth Clan, who worshipped Zamorak, took over Prifddinas during the Battle of Prifddinas. Rebel clans were forced to stay in Isafdar, a forest south of Prifddinas.

When the Fourth Age began, many of the goblin tribes fought against the other races for resources. In the early Fourth Age, Goblins battled with Ogres, whom they had lived with for ages on Feldip Hills area. They were eventually forced to move northward to the Kandarin areas due to greater strength of Ogres. There, they came in conflict with Gnomes, leading to battles between them. Due to illusion spells used by Gnomes, goblins stopped attacking the gnomes and eventually just trying to settle where they could. By the midpoint of the Fourth Age, goblins were losing the competition for resources and started to fight amongst themselves, culminating in the Battle of Plain of Mud. Throughout the Fourth Age, the majority of goblins became weaker and less intelligent, until they became only a minor threat to other races. They still started to spread over to other areas, like Asgarnia and Misthalin. Eventually, near the end of the Fourth Age, some of the goblin tribes started to build small permanent settlements, with Goblin Village being the most well-known.
Cave goblins remained underground, cut off from other civilizations with no major conflicts. Their main city, Dorgesh-Kaan, prospered while their knowledge of magic and technology grew. Approximately, during the early 19th century of the Fourth Age, they made contact with Juna and Light creatures.

TzHaar, living an isolated life since the First Age, make the first documented contact with the surface people. The TzHaar civilisation considered humans as pets during this time.

Under the rule of Lord Drakan, the Vampyres had taken all of Morytania and enslaved the population. The lands to the east of what was once Hallowvale became known as the Sanguinesti region, and this is believed to be where the vampyre populous lives. The Vampyres have less power the further they stray from this region, so outlying settlements are generally ruined and downtrodden. Those living north of the Mort Myre Swamp are relatively free to manage their own affairs; however, those in the Sanguinesti Region are treated like cattle and routinely drained of blood. All people in what is now known as Morytania pay Blood tithes to the Vampyres. Eventually, Lord Drakan felt strong enough to attack Misthalin, but he was defeated and the River Salve blessed against him. By the late Fourth Age, Morytania was little more than a legend, and people began to settle in the North. Later, they all became enslaved..