Secret Project: The Citizen Defense Force
"As the writhing, teeming mass of Mind Worms swarmed over the outer perimeter, we saw the defenders recoil in horror. "Stay calm! Use your flame guns!" shouted the commander, but to no avail. It is well known that the Mind Worm Boil uses psychic terror to paralyze its prey, and then carefully implants ravenous larvae in the brains of its still-conscious victims. Even with the best weapons, only the most disciplined troops can resist this horrific attack.
-- Lady Deirdre Skye, "Our Secret War"
Basically, it's a wall for every city. It's about as sucky as you expect.
Ectogenesis Pod:
"For centuries, the defining limit to population growth was that organic hosts were needed to incubate developing offspring. The Ectogenesis Pod removed that limit, allowing the creation of organisms without requiring developmental hosts.
The technology was long in development. Pre-Mistake civilizations of Earth were familiar with technologies for creating embryos (references exist as early as the 20th century), but could not bring those embryos to term without biological hosts. Much empirical and theoretical work in the area of geno-bio-ontologistics was required before the first ectogenetic banks could be brought online.
The Ectogenesis Pods are truly a wonder of their era, combining sophisticated genetic storehouses and recombinators with the first true Lotaxl tanks, all housed in a structure designed to insulate the developing creatures within from errant radiation, planetary contaminants, and marauding armies. From within the Ectogenesis Pods came forth new herds of animals for planetary Colonists, cures for microorganism-based diseases, and not infrequently, workers for the planetary colonies themselves."
I found the Ectogenesis Pod entry a LOT more engaging than the entry for Citizen's Defense Force, and this is one of the shorter Wonder entries.
SMAC didn't have Great People, and it didn't have as interesting a palette of Civilopedia text entries. That's why I think that CivBE would be best served by having a great writer create some scripts and memorable quotes and have it put to video and audio. Moreso than recasting Great People into roles already done by other things in the game.