Greg McKeown's Essentialism and the Cautiousness Facet (C6)
Greg McKeown is a writer and speaker who noticed that capable people were being quietly buried by their own options, saying yes to so much that nothing got their best. Essentialism is his corrective, and it is not a time-management trick. It is a discipline of subtraction: figuring out the few things that truly matter and deliberately starving the rest. On his site he defines the stance: "The Way of the Essentialist involves doing less, but better, so you can make the highest possible contribution." That deliberate weighing of what deserves your time is, in the Big Five, one facet.
The deliberate weighing is the Cautiousness facet
That facet is Cautiousness (C6), under Conscientiousness, how much you think before you act and weigh a choice rather than grabbing the first option. Essentialism is C6 aimed at your calendar. Where a low scorer says yes on impulse and sorts out the overload later, McKeown wants you to run every request through a hard filter first: is this the vital few or the trivial many. That pause, the refusal to commit until you have decided something is worth it, is what high Cautiousness does naturally, and following through on the priorities you set is where Self-Discipline (C5) takes over.
This is close to Barry Schwartz's warning about too much choice, but McKeown's answer runs the other way. Schwartz shows that endless options make us miserable; McKeown hands you the discipline to cut the options down before they can. For a low-C6 reader that is the useful part, because the fix is not to agonize more but to build a standard in advance, a clear enough sense of what matters that most decisions get made before they arrive. A very high-C6 person already lives this way and risks the opposite problem, weighing so long that nothing gets started. Essentialism is written for the crowded end, not the paralyzed one.
For a reader placing themselves, your C6 is a fair read on how naturally you pause to prioritize versus how often you find yourself overcommitted and wondering how. High on it and McKeown is describing an instinct you can lean into, with a nudge to make sure the weighing produces action. Low on it and the book is a case for installing the filter on purpose, since the discernment that comes free to some people has to be built by others. Where you sit on Cautiousness tells you how much of your overload is a trait you can work with, and we take the facet apart in Cautiousness (C6).
Read the book: Essentialism: The Disciplined Pursuit of Less by Greg McKeown.
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Research Citations
McKeown, G. (2014). Essentialism: The disciplined pursuit of less. Crown Business.
Iyengar, S. S., & Lepper, M. R. (2000). When choice is demotivating: Can one desire too much of a good thing? Journal of Personality and Social Psychology, 79(6), 995-1006.
Johnson, J. A. (2014). Measuring thirty facets of the Five Factor Model with a 120-item public domain inventory: Development of the IPIP-NEO-120. Journal of Research in Personality, 51, 78-89.
Costa, P. T., & McCrae, R. R. (1992). Revised NEO Personality Inventory (NEO-PI-R) professional manual. Psychological Assessment Resources.