A post on my favorite self-dafting website [1] makes a little advertisement for Essence [2], a new Heart of Agile [3] from one of the blokes who inflicted the RUP [4] on us. 

=> https://www.linkedin.com/posts/comicagile_agile-scrum-safe-activity-6851214652458762240-yhDp [1] Yo, LinkedIn.
=> https://essence.ivarjacobson.com/ [2] Look at Ivar Jacobson's marketing page.
=> https://heartofagile.com/ [3] Hint: it's not. HOA is about principles not methods. Check it out.
=> https://en.wikipedia.org/wiki/Rational_Unified_Process [4] Maybe you have heard of it: Rational Unified Process. From a time where people still thought that the answer to more D is more R. Of course the answer is more K, but who'm I telling anything new here [5]?
=> http://pespmc1.vub.ac.be/REQVAR.html [5] Ashby's Law [6]. Mildly interesting if you like to think about self-governance in complex environments. Take a good hard look what K does.
=> https://en.wikipedia.org/wiki/Variety_(cybernetics)#Law_of_requisite_variety [6] This is a more readable discussion of Ashby's Law.

This post is all about the footnotes. Therefore it ends here.