The Soviet KGB did not disappeared, it transformed itself into a "secret empire of power", and did not change its aims but merely its pace and adjusted its methods in the new political realities of Russia.
The policies of interfering and destabilizing the West continued and even improved in the new political landscape.
This in-depth study from the Rand Corporation, presents this very process of transformation, and is the foundation of understanding the true level of danger our societies face today.