2. COMPOSITE BEINGSSometimes in the course of our adventure we came upon worlds inhabited by intelligent beings, whose developed personality was an expression not of the single individual organism but of a group of organisms. In most cases this state of affairs had arisen through the necessity of combining intelligence with lightness of the individual body. A large planet, rather close to its sun, or swayed by a very large satellite, would be swept by great ocean tides. Vast areas of its surface would be periodically submerged and exposed. In such a world flight was very desirable, but owing to the strength of gravitation only a small creature, a relatively small mass of molecules, could fly. A brain large enough for complex ‘human’ activity could not have been lifted.
In such worlds the
