evolution
ˌiːvəˈluːʃ(ə)n,ˈɛvəluːʃ(ə)n/
noun
1.
the process by which different kinds of living organism
are believed to have developed from earlier forms
during the history of the earth.
2.
the gradual development of something."the forms of
written languages undergo constant evolution”
development, advancement, growth, rise, progress, pro
gression, expansion, extension, unfolding