They used their ever increasing power to suppress scientific knowledge and replace it with their religion.
Samah wouldn't attempt to suppress such knowledge.
There are no known instances in which Lincoln tried to suppress knowledge or discussion of such arrangements, and in some conversations, raised the subject himself.
As long as you aren't arguing that we should deliberately suppress knowledge or reject scientific progress just because the discoveries can be abused.
The Imperial government made attempts to suppress knowledge of the pre-Imperial past in order to strengthen the mystic aura of eternal rule.
So you had the psi all along, but suppressed knowledge of it, and used it only in unguarded moments, unconsciously.
Nemoto has worked to suppress knowledge of it.
At the beginning of his reign the Lord Ruler deliberately suppressed knowledge of gunpowder and most other advances.
The account of the Brotherhood was fascinating particularly in its mission to suppress knowledge of contact between the New and the Old Worlds.