He shows up at key points in history to try and rewrite it. His intervention led to the Magog destroying the Commonwealth.
Hence the naming of their ships Balance of Judgment
, Renewed Valor
and especially the ships The Continuation of Politics
and Salient Debate
is a relatively "normal" name - but it belongs to the Glorious Heritage Class
The Culture fell some time after Earth became a member. The Vedran Empire is the last offshoot of the Culture (and why they are able to Ascend to a Higher Plane of Existence, called "subliming" in the Culture.