Age of Silence was a 1500 year period where the races of Gliea were cut off from magic and celestial powers with one exception, the elves.
Apart from the elven race, all others lived simple (some would even say primitive) tribal and some even nomadic lives.
At the same time, the elven culture and civilisation were at a rise. Only they were familiar with reading and writing, and thus recorded the history during and before that time, even thought they rarely share it.
Races that existed during the Age of Silence were: Human, Elf, Dwarf, Halfling and Gnome.