My idea (long ago when I was reading through Traveller stuff but didn't build MTU yet) for the Solomani after the fall of the Imperium was that of what I called back then "the Daughters of Gaia". When the entire socio-economical fabric of the Imperium and the Confederation fell due to the prolonged Final War and the deep economic recession that accompanied it (I downplayed the role of the Virus and thought of removing it), several revolutions against the remanants of both polities took place. The masses, long opressed by Solomany Party fascism and Imperial occupation, rose up, and, joined with some of the remnants of the former Imperial and Confederate fighting forces, overthrew the stinking, maggot-eaten corpse when was the former government.
Among the leaders of these movement was the Solidariti party (an illegal anti-SolParty/anti-Imperial semi-revolutionary organization inspired by a post in this forum about the evolution of Ine Givar, I don't remember the details) and the Gaianist movement (a quasi-religious group that saw Gaia - their name for Terra chosen to show their difference from the SolParty - as the mother of Humanity and of much of the life in the universe; they worshipped "Viriditas", or Life-Force, and saw interstellar colonization and terraformation as their divine mission; they saw all life as equal and Gaia as the suitable focal point for it).
The result were several small polities and one large (almost sector-wide one) called the Gaian Matriarchate, a strange blend between a new-age "soft" theocracy, a decentralized democracy and a constitutional monarchy. The head of state was the Matriarch, a sort of a spiritual leader with (limited) presidental powers, ruling alongside a Council of Gaia over a hirarchy of semi-autonomous subsector and planetary councils, all elected (atleast in theory
). My ideas were quite preliminary and incoherent, but the feel was of a radical, revolutionary pragmatism and reserved optimism combined (and sometimes crushed by) a government that works on the moto of "the end justifies the means" on its road for (again, in theory, and, to a more limited degree, in practice) what it consideres as better life for the avarage citizen.
The whole theme was of what happend to high ideals when the clash with the harsh reality of the post-Collapse life. "The road to hell is full of good intentions" (or how does it go in English? I know only the Hebrew version of this proverb). Human tradegy, human horror, human heroism of fighting to remain loyal to your ideals dispite all odds.
Eventually I built my own TU, but MTU's Matriarchate and Alliance were influenced by some of these preliminary, even immature, ideas.
Among the leaders of these movement was the Solidariti party (an illegal anti-SolParty/anti-Imperial semi-revolutionary organization inspired by a post in this forum about the evolution of Ine Givar, I don't remember the details) and the Gaianist movement (a quasi-religious group that saw Gaia - their name for Terra chosen to show their difference from the SolParty - as the mother of Humanity and of much of the life in the universe; they worshipped "Viriditas", or Life-Force, and saw interstellar colonization and terraformation as their divine mission; they saw all life as equal and Gaia as the suitable focal point for it).
The result were several small polities and one large (almost sector-wide one) called the Gaian Matriarchate, a strange blend between a new-age "soft" theocracy, a decentralized democracy and a constitutional monarchy. The head of state was the Matriarch, a sort of a spiritual leader with (limited) presidental powers, ruling alongside a Council of Gaia over a hirarchy of semi-autonomous subsector and planetary councils, all elected (atleast in theory

The whole theme was of what happend to high ideals when the clash with the harsh reality of the post-Collapse life. "The road to hell is full of good intentions" (or how does it go in English? I know only the Hebrew version of this proverb). Human tradegy, human horror, human heroism of fighting to remain loyal to your ideals dispite all odds.
Eventually I built my own TU, but MTU's Matriarchate and Alliance were influenced by some of these preliminary, even immature, ideas.