This Is Your Brain On Parasites

How Tiny Creatures Manipulate Our Behavior and Shape Society
“Engrossing … [An] expedition through the hidden and sometimes horrifying microbial domain.” —Wall Street Journal

“Fascinating—and full of the kind of factoids you can't wait to share.” —Scientific American
 
Parasites can live only inside another animal and, as Kathleen McAuliffe reveals, these tiny organisms have many evolutionary motives for manipulating the behavior of their hosts. With astonishing precision, parasites can coax rats to approach cats, spiders to transform the patterns of their webs, and fish to draw the attention of birds that then swoop down to feast on them. We humans are hardly immune to their influence. Organisms we pick up from our own pets are strongly suspected of changing our personality traits and contributing to recklessness and impulsivity—even suicide. Germs that cause colds and the flu may alter our behavior even before symptoms become apparent.
 
Parasites influence our species on the cultural level, too. Drawing on a huge body of research in evolutionary psychology, McAuliffe argues that our dread of contamination is an evolved defense against parasites. The horror and revulsion we are programmed to feel when we come in contact with people who appear diseased or dirty helped pave the way for civilization, but may also be the basis for major divisions in societies that persist to this day. This Is Your Brain on Parasites is both a journey into cutting-edge neuroscience and a revelatory examination of what it means to be human.
 
“If you’ve ever doubted the power of microbes to shape society and offer us a grander view of life, read on and find yourself duly impressed.” —Heather Havrilesky, Bookforum 

How much of your personality is actually your own?

• Behavioral Science: Discover how parasites can manipulate their hosts with astonishing precision, from coaxing rats to approach cats to making fish easier for birds to prey on.
• Host Manipulation: Explore the unsettling evidence that common organisms, some from our own pets, may contribute to personality changes like recklessness and impulsivity.
• The Psychology of Disgust: Uncover the theory that our instinct for revulsion is an evolutionary defense against contamination, a mechanism that helped build civilization.
• Microbiology and Society: Examine how this ancient fear of disease may be the biological basis for major divisions in societies that persist to this day.

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