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It needs some major work by an expert who knows about backreaction. J Mark Morris ( talk) 06:40, 2 February 2019 (UTC) reply

Or maybe by a nonexpert who doesn't already know what backreaction is. The current article tells us some things about backreaction but makes no attempt to explain what it is. — Preceding unsigned comment added by 129.79.147.64 ( talk) 15:03, 21 June 2019 (UTC) reply

still incomprehensible -- 75.86.180.62 ( talk) 15:02, 27 May 2020 (UTC) reply