The imperialistic warlike Irken race is an insectoid species native to the planet Irk and are feared throughout the universe for their goal of entire domination over everything by counquest which the irkens are likely to succeed in due to the military superioriority which has expanded the irken empire over many worlds the irkens latest military campaign Operation Impending Doom 2 has been a great success with the counquering of planet Blorch the Conveyor belt planet and Vort and the enslavement of the super intelligent vortian race the Irken Armada will keep the empire expanding over many more planets marked for counquest to come.
The whole irken mindset is fully focused on total domination of the universe as irkens feel an urge like need to counquer other worlds this urge could actually all come from the Irken PAK if not the irkens themselves not acting out of free will to think for themselves but at the same time this could not be the case considering that Zim is a defective with a damaged Pak and still feels a mighty need to counquer Earth
The irkens have a height based society which the Tallest living irken rules over as the Almighty Tallest but on rare occasions there is two tallests who are exactly the same height such as the case for the current Tallests Red and Purple. Tall irkens are respected and get high-ranking jobs while short irkens get low paying jobs.
Irkens are born in cloning tubes in facilities known as the hatcheries deep under irks surface and can speak and walk when born due to them given the whole of irken knowledge which is transferred after their PAK is installed moments before after they are greeted with a voice recording which says Greetings Irken child welcome to life report for duty,, an irken baby is trained through childhood under irk and is not allowed up on the planets surface until adulthood.
The PAK is the key to an irkens knowledge and has an irkens rank and career on it and can be changed by the control brains to a different rank or job also the PAKs take note of an irkens success and high scores the PAKS are equipped with robotic spider legs for combat. An irken cant live without their PAK for more than ten minutes.