progressionist
Concise Oxford English Dictionary © 2008 Oxford University Press:
progressionist /prəˈɡrɛʃ(ə)nɪst/ chiefly historical
▶noun
- 1 Biology a supporter of the theory that all life forms gradually evolve to a higher form.
- 2 an advocate of political or social progress.
'progressionist' also found in these Oxford entries:

