Five Doomsday Weapons of the Sci-fi universes, and the theories of Deterrence... why do they fail?

Possible space weapons lead into the military value of navigation and communications satellites.

Weapons launched at satellites differ from systems stationed in orbit; the proposed orbital system remains unverified.

An analogy with naval arms treaties asks what keeps states observing restrictions over time.

Patrol vessels, larger warships, and troops illustrate escalating signals short of war.

An exercise can signal promptly, while the ships needed for a future balance take years to build.

An alliance can lose specialist capacity when members each expect another navy to retain it.

Extraordinary mobility does not prevent the Iconians' opponents from combining against them.

The Death Star's secrecy conflicts with the Tarkin Doctrine's plan to control subjects through fear.

Demonstrating Starkiller Base reveals its power and gives scattered opponents a reason to organize.

The book version of Thrawn is judged unlikely to support so much spending on one fixed asset.

A medieval time-travel example puts durable state infrastructure ahead of imported military technology.

Hyperspace missiles offer distant, adjustable strikes, while concentrating the weapon in one asset leaves it vulnerable.

A planet-eating machine raises the problem of control after its makers or crew are gone.

Crew placement and an external breaker illustrate the control measures a powerful weapon needs.

Using an energy web as a barrier raises a traffic problem, although viewers challenge this simplified account.

The Genesis Device illustrates the hazard of concentrating a planet-changing capability in one system.

Energy filaments enclose a vessel, and the sealed web becomes self-generating, preventing escape and obstructing outgoing fire.

The smaller Xindi strike causes damage while revealing the danger before the planned larger attack.

Dakara's galaxy-wide reach raises questions about access to its exposed installation and control after its first use.

A proposed mobile Dakara weapon could strike Wraith-held worlds, but it would kill their other inhabitants too.

A comparison with Warhammer's Chaos gods turns on the different roles that followers' belief plays.

Enough persistent debris would crowd orbital space, especially where orbital decay does not remove it.

The public rationale recalled is fear of a slippery slope, while the identity of any system placed in orbit remains unknown.

Tentatively yes, although using them and declining to use them both create strategic problems.

Checks against war games, exercises, real events, and history can expose problems in prolonged theoretical debate.

A scenario can establish its divergence from history while leaving later events to the war game.

Yes, it is judged to be on that scale.

Core-drilling missiles in Babylon 5 raise a speculative question about protecting their electronics.

The Supergate is strategic movement infrastructure, comparable to a major wormhole route.

Babylon 5's self-replicating machines prompt a concern about errors accumulating as they multiply.

Secrecy could slow construction and restrict the yards and defenses available to the project.

The recalled estimates understated Yamato's armament, while intermediate judgments could distort good photographic analysis.

Intelligence needs expert context, while repeated repackaging can separate leaders from the original information.

The device claim is unverified; a laboratory demonstration alone does not establish reliable military operation.

Phasers or phased lasers offer immense power, and transporter systems also raise concerns about destructive potential.

Vanguard, because her size suggests room for the conversion.

The cost of the AI infrastructure is considered beyond the available government budgets.

Existing electronic warfare and naval guns could help against small drones while laser systems mature.

They resemble ship-carried nuclear arms, with other powers able to possess equivalents.

A claim that a nuclear explosion could transfer all its energy into a laser beam meets a materials objection.

Pacific War battle names such as Philippine Sea, Iwo Jima, or Okinawa are suggested, with an admiral's name also possible.

Yes, with their performance judged poor.

An anti-Wraith device also makes the gate network hazardous for its users.

Atlantis's defences are compared with a ship relying on one missile type for every threat.

Repeated attacks during a major war justify adding weapons and spreading power modules and reserves around the ship.

The Replicators rebuild after a devastating strike and retaliate against Atlantis.

An immense new power source ends in a solar-system-scale disaster in Stargate.

The survivor would still threaten everyone else and would emerge stronger.

The Daleks' Reality Bomb would spread destruction through time and parallel universes.

A film's supposed F-22 is criticized for hovering and having the wrong tail arrangement.

A single Dalek hub joins fleet operations to the Reality Bomb's deployment.

Firing the rings would kill sentient life across the galaxy to starve the Flood.

The scale of ring and Ark construction prompts a debate about other ways to fight the Flood.

Their failure is acknowledged, while the proposed alternative favors simpler, effective machines.

Simpler robots under remote control are proposed, but a further objection says even basic logic systems can be compromised.

A proposed shipborne weapon would attack infected planets and ships while sparing the rest of the galaxy.

A bayonet cartoon is used to explain restraint when each side can retaliate.

People who have already accepted the risk of death may remain unmoved by a more destructive threat.

A qualified recollection about Hong Kong raises the question of how inherited administrative rules expand officials' options.

Seven are recalled as belonging to the later period and eleven larger rings to an earlier one, but the chronology is explicitly uncertain.

A plan to destroy only infected worlds faces the requirement to eliminate every surviving spore.

The Halo Array's destructive power does not make the Flood susceptible to deterrence.

The surviving Daleks would probably fight among themselves.

The Scottish independence example raises a question about politicians' incentives to solve the problems they campaign on.

None comes to mind as a durable deterrent; brief success is allowed but judged of limited use.

It would be an experience one would not want repeated; its classification remains undecided.

With few alternatives, piloting a ship into the machine and escaping by transporter was a workable plan.

Joint purchasing could make expensive resurfacing machinery affordable, but councils still have to agree on buying and using it.

A recollection of Surrey refuse-vehicle purchasing shows how holdouts can frustrate fleet standardization.

A balanced strategic deterrent is excluded because the threats are reciprocal.

Accounting rules can demand repayment over a much shorter period than the infrastructure's useful life.

A favorable first strike might give the group a chance; without one, it could face serious trouble.

The Demat Gun removes a target from time and space, while the Crucible carries a bomb with a much wider effect through time.

A storm attack can overwhelm an opponent while leaving the attacker little control over its damage.

They are classed as strategic weapons because equivalents are recalled elsewhere in their settings.

The Galaxy Gun, qualified by a wish for better design and more examples of the weapon.