After two careful reviews and thorough revision by the authors, I believe the manuscript is now almost ready for publication. Please find minor corrections below that should be implemented.

“the MISI” or “MISI”: I agree with the reviewer that it would be more appropriate to use “MISI” without the definite article. While I concede that language norms are not always universal or logical, dropping the definite article would be most consistent with European style guides (see, e.g., http://publications.europa.eu/code/en/en-4100800en.htm), as well as modern usage of the term (e.g., Pattyn, 2018, Nature). Please adjust the text accordingly.

“Flowband” or “flow band”: I believe either formulation of this term is acceptable. However, if you use the latter (as in the current version of the manuscript), then please only use the hyphenated form when it serves as an adjective “flow-band model” and otherwise “flow band” when it serves as a noun. Please check the manuscript for consistency here.

Footnote on page 4: There is a typo here “The idea that society could face such severe disruption without doing •itsomething about it was deemed politically impossible.”. Also please rephrase “deemed politically impossible” to the active sense to be consistent with the text – otherwise this sounds like it was deemed so by someone else.

Figure 5, caption: also shown => is also shown

Page 14, line 25: “several decades” sounds speculative here. Please justify or rephrase (even just with the addition of a “will likely require”).

Page 17, line 5: This phrase is also not easily justifiable: “This is not a project that would begin soon.” I suggest deleting this sentence and adjusting the last part of the subsequent sentence: “must be done first” => “is needed before such a project could be undertaken.” – or something along these lines.