  Nikos Voglis had many astronomical interests, among them was the question of
the origin of galactic angular momentum. In this short tribute we review how
this subject has changed since the 1970's and how it has now become evident
that gravitational tidal forces have not only caused galaxies to rotate, but
have also acted to shape the very cosmic structure in which those galaxies are
found. We present recent evidence for this based on data analysis techniques
that provide objective catalogues of clusters, filaments and voids.
