Some people love socializing.
Some people just don't, and the reason for the difference could be genetic, if what is true for laboratory roundworms turns out to be true for people. By looking at natural variation in the behaviour of soil nematodes as they forage for the bacteria that they feed on, de Bono and Bargmann hoped to identify genes that are involved in determining behavior in this simple organism. This may help eventually to identify similar genes in more complicated organisms like ourselves. Two different foraging behaviours have been identified in nematodes in the wild, 'solitary' and 'social'. They appear to be genetically determined, as 'social' and 'solitary' nematode strains can be distinguished.