A short list of maxims from an organization which depends on high-performance human teams, US Special Operations Forces, https://www.socom.mil/about/sof-truths

  Humans are more important than hardware
  Quality is better than quantity
  Special Operations Forces cannot be mass produced
  Competent Special Operations Forces cannot be created after emergencies occur
  Most special operations require non-SOF support

For software development, see HN discussions which reference Mythical Man Month (1975), https://hn.algolia.com/?query=mythical%20man%20month&type=co... & the book itself (pdf): https://web.eecs.umich.edu/~weimerw/2018-481/readings/mythic...