"In the book, America had already been weakened by bio terror plagues before waves of selfish violence took down the rest. But the real enemy was the kind of male human being who nurses fantasies of violent glory at the expense of his fellow citizens"

David Brin's quote looks into styles of social collapse and the human proclivity towards violence and self-interest. The preliminary part of the quote suggests a dystopian setting where America has actually been considerably disabled by bioterrorism-- a chilling reminder of the vulnerabilities present in modern societies due to biological hazards. This weakened state is more worsened by waves of "self-centered violence", suggesting prevalent turmoil and social breakdown initiated through private and collective acts of aggression driven by self-interest instead of common wellness.

The expression "self-centered violence" underscores a crucial observation about human behavior: that in times of crisis or viewed existential risk, people might resort to actions that prioritize individual survival or gain over the cumulative excellent. This behavior can result in a wear and tear of social order, transforming neighborhoods into chaotic battlegrounds where trust is deteriorated and cooperation is abandoned.

However, Brin determines a deeper, more perilous danger to society's stability-- certain kinds of male characters who harbor "fantasies of violent glory". This idea points to a particular psychological archetype that positions a danger not through external risks like bioterrorism, but through internal social dynamics. These individuals desire recognition and power through violence, dreaming of situations where they can emerge as 'heroes' or prideful figures in the middle of turmoil. This egotistical mission for heroism comes at the "expense of fellow people", suggesting that such people would sacrifice the well-being of others to achieve their delusional sense of glory.

Ultimately, Brin's quote suggests that while external dangers like bioterrorism are intimidating, the more profound and long lasting threat to society may originate from within-- from individuals who make use of crises to meet their damaging dreams. The implication is a call for introspection and awareness of the psychological and cultural narratives that glorify violence, prompting us to reassess what makes up real strength and heroism in a harmonious society.