Greene describes the concept of “self-directed warfare” as the basis of all strategies. He reflects that before fighting against external enemies, people need to discipline their own minds. He argues that confusion, emotional turmoil, and moral ambiguity cause defeat long before the arrival of an external enemy. The main cause of failed strategies is not the strength of the enemy, but the fact that most people are unable to clearly define what or who they are fighting against and why.

Greene uses historical examples to support his argument. He references Xenophon, who led a group of stranded Greek mercenaries in Persia after their leaders were executed. According to Greene, these mercenaries were suffering from a mental rather than a logistical problem. Their minds lacked purpose and clarity, which left them unable to fight back. When Xenophon declared the Persians to be their unequivocal enemies, he clarified the objectives and parameters of the fight for the mercenaries and restored their morale. Greene also cites the example of former British Prime Minister Margaret Thatcher, exploring how political polarization helped Thatcher to gain power.

The chapter reflects late-20th-century examples of indirect conflict, such as corporate politics, moral posturing, and passive aggression that avoid direct confrontation. Greene applies classical warfare principles to this context, encouraging his readers to adopt indirect forms of hostility and challenge the cultural imperative to be constantly conciliatory. However, the chapter also presumes a highly individualistic and confrontational subject, one who is free to “choose” enemies and engage with conflict, making it less relevant to contexts with structural inequality or dependence. Greene’s endorsement of clarity, self-discipline, and strategic framing provides a useful approach to contemporary power struggles by challenging the idea of conflict as a moral failing rather than a necessary step toward success that just needs to be managed well.

Greene argues that strategic failure is usually a result of fighting the last war and not the current one. He explains that people often hold on to past victories, customs, and ideas because of the psychological comfort they provide, which prevents them from seeing reality for what it is.

Greene bases his argument on a number of historical examples. The Prussian defeat at Jena in 1806 is used to demonstrate how institutional rigidity contributed to strategic failure. The Prussian generals were trained in the style of Frederick the Great and saw warfare as a science, which resulted in a failure to recognize the importance of Napoleon’s use of speed and flexibility in warfare. The Prussian generals were using an approach that was no longer relevant, which caused their discipline to work against them.

Greene also cites Miyamoto Musashi’s approach to strategy, which he believes is an example of a present-moment approach. In his many battles, Musashi never used repetition to defeat his opponents, which Greene argues is what made him a successful swordsman. Instead, Musashi unsettled his opponents psychologically and used creativity to respond to each duel uniquely, resulting in consistent victory.

Greene contextualizes this example within a larger critique of modern overreliance on expertise, training, and knowledge. Using philosophers like Clausewitz and Sun Tzu, Greene focuses on friction—the gap between planning and execution—as the key test of intelligence. The utility of this chapter lies in its assertion that success is less about preparation than about the ability to change one’s mind, forget what worked in the past, and be present and ready to adapt.

Greene’s guerrilla-mind metaphor encourages one to see strategy as learning in motion. In comparison to other approaches to decision-making based on doctrine and rules, Greene’s ideas are more aligned with other process-oriented approaches to strategy. However, the chapter assumes that flexibility is largely an internal cognitive challenge, overlooking the way that external structures might limit one’s ability to be flexible.

Greene explains that success in high-pressure situations depends on one’s ability to remain mentally balanced, decisive, and emotionally in control amid chaos. He argues for this approach as a counterbalance strategy, where a leader, in the face of fear, doubt, and confusion, does not become more cautious and reflective but instead becomes more clear-headed, resolute, and in control in order to maintain momentum.

Greene cites examples of figures who experienced immense psychological pressure to support his argument. He refers to Admiral Horatio Nelson, who showed controlled aggression in the Battle of Copenhagen when he refused to retreat despite orders to the contrary, pressing on with the attack until the Danish defenses were breached. He contrasts this bold aggression with leaders who are cautious and reflective in high-pressure situations, arguing that caution in such situations is often a result of fear rather than wisdom. He uses film director Alfred Hitchcock, noting his presence of mind as a key factor in his success. While Hitchcock appeared detached amid the chaos on the sets of his films, Greene argues that his meticulous preparation enabled him to remain calm while others were panicking around him.

Greene’s argument follows directly from classical military and philosophical discussions on composure under pressure, such as Carl von Clausewitz’s On War (1832) and Miyamoto Musashi’s The Book of Five Rings (1645), which emphasize presence of mind as critical when plans go awry and uncertainty intrudes. Like Clausewitz, Greene treats emotional disturbance as a form of strategic friction that interferes with judgment at critical moments. His stress on preparation as providing presence of mind follows Musashi’s argument that mastery allows one to act spontaneously without any form of deliberation. Greene’s dismissal of reflective reassessment during times of crisis positions him closer to classical discussions that treat hesitation as destabilizing when conflict has already begun, distinguishing his work from modern leadership literature. For him, emotional intelligence is less about interpersonal awareness and more about viewing emotional disciplines as a form of strategic insulation, supporting Greene’s overall argument that mastery of the inner battlefield precedes mastery of the outer one.