Type 15 Societies

A Type-15 society spans most of the known universe, and may consider entire galaxies as property, with particular groups or individuals claiming stewardship (or even outright ownership) of worlds that are entirely unaware of them.

The Time Lords of Gallifrey are masters of tesseract engineering, allowing the TARDIS' tiny exterior to conceal a massive and constantly reconfigurable spacetime vehicle. (Doctor Who, 1963)

These societies tend to be concerned with matters of doctrine or moral authority; they may cast themselves as the Protectors (the Green Lanterns), Stewards (the Precursors), or Rulers (Mumm-Ra) of lesser civilizations, and direct their energies primarily toward this mandate.

Despite (or perhaps because of) their massive technological power, wars between these civilizations can be truly apocalyptic, often resulting in the extermination of the society in question (and its ensuing regression into lower-tier civilizations), or even the destruction of the universe itself.

The mecha deployed by such a civilization will essentially be "magical" armour, turning the wearer into a superpowered god-being (in this case, summoned from subspace by a gauntlet). (Thundercats, 2011)

Footprint: Multiple galaxies (possibly spanning observable universe).

Sustainable Population: Hundred quadrillions

Government: Libertarian democracy. Central political authority has little influence; technology means that the government isn't powerful enough to enforce direct control (unless that control can be "built in" to the species on a physical level).

Their creator's imperative to exterminate all life is so deeply ingrained that a truly heroic effort (or catastrophic, likely-terminal damage) is needed for an individual Dalek to even be capable of thinking for itself. (Doctor Who; Into the Dalek, 2014)

Bureaucracy: Distinct sub-societies, with complex interrelations. May be indistinguishable from lower-tier civilizations.

Language: Universal translator in use.

Literacy: Universal.

Network: Universally accessible, instantaneous. Fully-immersive telepresence may be possible (with people "appearing" when they wish to talk to someone, then vanishing). Loss of network access is an emergency to be investigated in force (since it can't possibly fail naturally, which means someone is actively jamming it).

Religion: Organized spirituality and traditional ethical codes. Theism has been replaced with self-reverence or Ancient-worship ("spirits" will replace "gods"). Spirituality and magic are nothing more than well-decorated science and technology.

Science: Required technologies will be either micronized, implanted, or bioengineered. "Real" and "artificial" life will be indistinguishable. Bioengineering allows for the creation of entirely new species ex nihilo. Interdimensional travel is being studied (and may be available to select factions), and working time machines may be available. Technology may allow these beings to manipulate the fabric of reality using tesseracts and extra-dimensional engineering. Multidimensional construction is now possible; machines and mecha may now include non-contiguous parts (part of the structure extends into dimensions not normally perceptible).

Created by the Guardians of the Universe, A Green Lantern ring contains a pre-programmed replicator (to create the uniform), a forcefield generator, solid-state holoprojectors, a universal translator, a full sensor suite, an intergalactic-range ansible, an adaptable life-support system, antigravity-field generators, an FTL drive, a neural interface capable of reading and communicating with the user's mind in their own language, a scanner capable of detecting specific brainwave patterns at interplanetary distances, and an AI autopilot. It is limited only by the user's willpower, imagination, and its own battery life. (Green Lantern movie, 2011)

Medicine: Members of this society will be effectively immortal and unkillable (able to regenerate from single cells with no external assistance). The only way for them to end is through deliberate and concerted effort (imprisoning them in stasis, then destroying them cell-by-cell while they're still paralyzed). In many cases, "permanent" stasis is more practical than death, even for criminals (who will be "sealed away" rather than executed or imprisoned).

Education: Universal. Engrammatic implants are standard.

Energy: Infinite energy is available, possibly channeled through relays (smashing a relay is as effective as destroying a generator).

Industry: Mass-production no longer exists. Personal replication via nano-swarms handles most material creation. Craftsmen routinely produce one-of-a-kind artifacts far beyond the capabilities of lesser civilizations.

In a Type-15 society, even something as utilitarian as a starship docking bay will be crafted as a work of art. (Jupiter Ascending, 2015)

Military: May be the only unified culture remaining. Weapons exist that are capable of functioning on both intergalactic and submicroscopic levels --judiciously deleting entire species from existence. Soldiers may operate individually, rather than as organized units; a single soldier is the equivalent of an entire army.

Economy: Nonexistent. Rare objects and resources will be sought out by individuals seeking influence, but there will be no organized mining, farming, or trading taking place. Physical wealth no longer has meaning.

Food: May be unnecessary for sustenance, used only as recreation or a display of status.

Travel: All citizens have full access to intergalactic travel (via ship, teleportation, wormhole, or telepresence). Point-to-point teleportation is routine.

Spaceflight: Technology now allows for unassisted "shirt-sleeve" spaceflight as needed (pressurization, life-support, communications, radiation shielding, etc are all handled by wearable or built-in tech), possibly including FTL. Large starships are now essentially mobile space-stations (spacegoing palaces, fortresses, or cities). Smaller ships may be necessary for particularly long-range intergalactic travel.

The distance between Oa and the Frontier is so great that even Lanterns must rely on an ultrawarp-capable ship to travel there. (Green Lantern the Animated Series, 2012)

Alien contact: Unnoted. The prevalence and ease of physical modification at this level means that identifying individuals by species is useless. To lower-tier societies, a Type 15 society may register simply as singular supernatural beings rather than as a civilization.

Examples (reality):
Examples (fiction): Green Lantern Corps, Daleks, Time Lords(*), Galactic Padishah Empire, Precursors (speculative, based on technology), Intergalactic Commonwealth, Mumm-Ra's people, Galra Empire.

(* We've seen that the TARDIS can travel to other universes, but the Doctor goes to great lengths to avoid it. It seems to be a Time Lord law --one powerful or culturally-ingrained enough for even the Doctor to respect.)