also nonproliferation, "prevention of the spread of anything," especially and originally "prevention of the increase in the number of countries having nuclear weapons," 1965, from non- + proliferation.
a prefix used freely in English and meaning "not, lack of," or "sham," giving a negative sense to any word, 14c., from Anglo-French noun-, from Old French non-, from Latin non "not, by no means, not at all, not a," from Old Latin noenum "not one" (*ne oinom, from PIE root *ne- "not" + PIE root *oi-no- "one, unique"). In some cases perhaps from Middle English non "not" (adj.), from Old English nan (see not). "It differs from un- in that it denotes mere negation or absence of the thing or quality, while un- often denotes the opposite of the thing or quality" [Century Dictionary].
1859, "formation or development of cells by budding or division," from French prolifération, from prolifère "producing offspring," from Latin proles "offspring" (see prolific) + ferre "to bear, carry" (from PIE root *bher- (1) "to carry," also "to bear children"). The meaning "enlargement, extension, increase in number" is from 1920; especially of nuclear weapons by 1960 in the jargon of the U.S. State Department.
<a href="https://www.etymonline.com/word/non-proliferation">Etymology of non-proliferation by etymonline</a>
Harper, D. (n.d.). Etymology of non-proliferation. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/non-proliferation