Another curiosity was the Shaa dating system, which began in the “Peace of the Praxis One,” some 437 years before their appearance in the skies above the Naxids’ home world. This suggested a time before the Praxis claimed the Shaas’ devotion, but no Shaa could be persuaded to confirm this surmise. Nor did the Shaa revere whatever Shaa—if itwas a Shaa—who first formulated the Praxis, or remember its name.

For the Shaa were adamant that every species—that thephysical universe itself — should submit to terms dictated by the Praxis. Whole categories of technology were absolutely forbidden—machine intelligence and autonomy, the translation of organic intelligence into machine or electromagnetic form, and machines constructed to manipulate matter at the molecular or atomic level. Genetic manipulation was also forbidden—the Shaa preferred the slower process of natural selection, the more unsentimental, the better.

The iron will behind these prohibitions was demonstrated again and again. Those who offended against the Praxis were punished by death, often horribly and publicly, for the Praxis itself commanded that “those who offend against the fundamental law shall receive punishment in greater proportion than their crime, so that public virtue may be maintained by this example.” Nor were the Shaa or their followers shy about using the most poisonous and destructive weapons to support their ethic. Antimatter bombs sometimes destroyed whole cities for the crimes of a few citizens, and on one occasion, when a small group of Terrans was discovered using genetic technology in hopes of breeding a plague that would kill off the Shaa, their entire planet was bombed to death, the great explosions raising vast clouds of smoke and dust that drew a curtain across the sun, condemning the survivors to lingering, freezing death in a frigid atmosphere poisoned by radiation.