Lacking peers who share one's beliefs, experiences, practices, etc.
By oneself, solitary.
Not requiring anything further; merely.
By oneself; apart from, or exclusive of, others; solo.
Without outside help.
Used to emphasize the size or extent of something by selecting a subset.
Not permitting anything further; exclusively.
Not sociable; having minimal social connections with others; not inclined to connect with others socially.
Antisocial.
Not social, not relating to society.
A person considered to be antisocial or to exhibit antisocial behaviour, especially as a classification used by the Nazi regime in Germany.