system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek] If pushed how dangerous would The Federation be?

Suppose the federation truly armed its self for total war. Starting with the recall of all exploration missions and only built ships(total refits as well) that were meant for one thing and one thing only war, how powerful would they be?
gpt
Extremely, but not necessarily in the context of warships or weapons.  The federation has vast scientific knowledge and resources which it simply refuses to use for reasons of morality, rather than logistic concerns.

This can be seen at certain crisis points in the history of the federation when they were tempted to compromise their morality in the name of survival.  When faced by the existential threat of the Borg, the federation was able to develop a virus to shut down an entire cube, and developed a weaponized version that was theoretically capable of genociding the entire race.  Whole the first iteration of that virus would have doubtlessly failed against the entire collective, the principle remains sound.  If the federation were in danger of being completely destroyed (after the successful assimilation of earth for example), resources would no doubt be devoted to the development of an anti-borg superweapon capable of disabling or destroying the whole of the collective.

In a similar vein, the founders, leader race of the dominion, were infected with a biological weapon capable of genociding the entire race after it became clear the dominion was winning a conventional war against the federation.  This single action was enough to force the dominion to surrender, or collapse.  

With its knowledge of the omega particle, the federation is theoretically capable of weaponizing the particle into a bomb capable of destroying light years of space in a single detonation, and permanently damaging Subspace throughout the entire area.  Such a doomsday weapon would be capable of destroying the core systems of any known species with the exception of certain 'godlike' species, such as the Q.  

I speculate that such a weapon would place even a member of the Q continuum in mortal danger.  Due to the federation-wide ban on even disseminating knowledge of the existence of the omega particle, there is insufficient data to prove this.