The main thought is this:
"Was the Last Great Time War (and its resultant conflicts in seasons 1-4) a self-fulfilling prophecy/predestination paradox? (I use both because I can never remember exact definitions for the two)
My reasoning is as follows:
- In Genesis of the Daleks, the Time Lord says "We foresee a time, when the Daleks will have destroyed all other life forms and become the dominant creature in the universe"
The Time Lord then orders the Doctor to avert the Dalek's creation
This act is noted in the expanded media, and the "Aliens and Enemies" book as the trigger that caused the Time War in the first place
The Time War happens, everyone dies, the Cult of Skaro escapes, hides, dies, Caan goes back and rescues Davros
Davros proceeds to build a weapon that will kill everything and leave the Daleks as the sole creatures in the universe
That sounds, to me, very much like what the Time Lords foresaw.
Hence, I believe it is possible that the Time Lords saw a possible future where the Reality Bomb was detonated, and acted to avoid this future, and in doing so, set up the events that caused it to happen anyway