The Best of Both Worlds is the story of the conflict between two races, the human and the Borg, viewed by the humans as their supreme enemy. The Borg are a highly advanced race, whose technology supercedes the technological capabilities of the U.S.S. Enterprise and thus humans seem to have met their match in this encounter with their deadliest foe. This leads us to a disturbing thought that perhaps at some later stage of evolution, man and machine may become one. This means that the Borg do not think independently, nor are they considered as individuals in their own right.
Thoughts are collective, rather than individual.
The Borg operate in a unified harmony, although they have sacrificed individual liberty at the cost of achieving a collective identity. This concept is the antithesis of human perceptions of the self and individuality which differentiate human beings from each other. Humans are rich in emotions and their actions are sometimes guided by their emotions. The Borg, on the other hand, have muted feelings and emotions and share in a network of thought which comprise the Collective. As recently discovered in a Voyager episode, Human Error , the Borg's emotions have been suppressed by implants.