There exist obvious higher-order influences in any planetary system. This is
often demonstrated by introducing terraform life onto newly discovered planets.
In all such cases, the life in similar zones develops striking similarities of
adaptive form. This form signifies much more than shape; it connotes a survival
organization and a relationship of such organizations. The human quest for this
interdependent order and our niche within it represents a profound necessity.
The quest can, however, be perverted into a conservative grip on sameness.
This has always proved deadly for the entire system.

-- The Dune Catastrophe, After Harq al-Ada
--[children-of-dune]--