essentialism
Concise Oxford English Dictionary © 2008 Oxford University Press:
essentialism/ɪˈsɛnʃ(ə)lɪz(ə)m/
▶noun Philosophy a belief that things have a set of characteristics which make them what they are; the doctrine that essence is prior to existence.
– derivatives
essentialist noun & adjective.
essentialist noun & adjective.
'essentialism' also found in these Oxford entries:

