Most animals in nature are solitary because there is simply no reason to be social. Many of them get together to mate (if they reproduce sexually), and clonal species do not even need to mate so they don't even need to find other members of the same species. Some of them simply release sperms and eggs into the open water, so they do not need to meet either. Besides those species are usually sessile (meaning they are attached to some surface, such as rocks), so they cannot even move.
There are reasons some animals become social or gregarious. Gregarious species are not truly social as they merely stay close to other individuals of the same species without forming bonds or even act nicely to each other. For example, many birds (such as penguins and sea gulls) may nest together but they do not interact with one another, other than pecking at strangers who get too close when they pass by. Many fish form schools, and many birds flock together because they find safety in numbers.
If not being social or gregarious is psychopathic, than a vast majority of animals are psychopaths. Even so, if being solitary actually has no negative effect on survival or reproduction, then it is not deleterious, or bad. The small percentage of species that are social find that it enhances survival and reproduction. For example, humans are kind of weak and we do not stand a chance against predators when we are alone. Therefore it makes sense for humans and our ancestors to form social groups because that was the only way to survive. Even today, humans cannot function as solitary animals. We need family members to help raise us. Orphans cannot survive on their own without adults adopting them and caring for them. Because humans are obligatory social animals, we do need to live in close proximity to other humans and form bonds with family members or with other individuals who may have no relationship with us, just to survive. Indeed, if an individual is hostile to all other humans, and act violently to all other people, then in fact they may be psychopathic.
· 4 months ago