<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>tomasreimers</author><text>The mind-controlling--probably a better phrase for them is &amp;quot;behavior altering&amp;quot;--class of parasites are fascinating from an academic sense... and nightmare fuel from a day-to-day sense. Two additional cases which I remember studying in school are:&lt;p&gt;(1) A parasitic worm which causes snails to climb to clearly visible positions so that birds can eat them. These snails are usually avoidant of those positions, and so this is clear behavior alteration. (&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=fkiL-v4X8w8&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=fkiL-v4X8w8&lt;/a&gt;)&lt;p&gt;(2) A parasitic fungus which takes over ants, causing them to climb up high and then bite (!!! this means it can affect specific muscle movements) into a plant, before bursting from the body and spreading spores (&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=vijGdWn5-h8&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=vijGdWn5-h8&lt;/a&gt;, apologies for the mildly dramatic nat-geo video)&lt;p&gt;And for a good piece of sci-fi on the first-person experience of seeing others rapidly&amp;#x2F;inexplicably change behavior, check out [The Screwfly Solution](&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;The_Screwfly_Solution&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;The_Screwfly_Solution&lt;/a&gt;). (It&amp;#x27;s a good read intended as commentary on patriarchy, and it also uses a behavior altering piece of biology as a key plot device.)&lt;p&gt;There is a part of me that wonders if there are things (viruses&amp;#x2F;bacteria&amp;#x2F;funguses) which effect human behavior. And if in 100&amp;#x2F;1000s of years into the future we&amp;#x27;ll look back and realize that some subset of maladaptive personality traits and&amp;#x2F;or mood disorders aren&amp;#x27;t something that simply &amp;quot;happen&amp;quot; to someone, but are instead explained by biology&amp;#x2F;chemistry we didn&amp;#x27;t have a good understanding of. The same way we now look at ancient Rome and say &amp;quot;yeah, their use of lead pipes definitely had some effect on their psychology&amp;quot;.&lt;p&gt;Then again, there is something deeply human to say &amp;quot;nah, we are fully in control of our psychology. These things only happen in simpler animals, and our more-complicated biology means this could NEVER happen to us&amp;quot;.</text><parent_chain></parent_chain></comment><story><title>“Zombie cicadas” infected with mind-controlling fungus return to West Virginia</title><url>https://www.cbsnews.com/news/zombie-cicadas-infected-mind-controlling-fungus-west-virginia/</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>hirundo</author><text>Humans certainly get infected with mind-controlling memes. How sure are we that there aren&amp;#x27;t fungal&amp;#x2F;bacterial&amp;#x2F;viral sources of change to human behavior? Maybe an infection could make us more peaceful or warlike, authoritarian or laissez-faire, pious or agnostic, obedient or obstinate. Political and religious movements sure seem to spread like biological infections. I wonder if there are epidemiological measures that could tell the difference. Velocity of spread could be discriminator, but you&amp;#x27;d have to test that on populations that are culturally but not physically isolated and visa versa, which is a tall order.</text><parent_chain></parent_chain></comment><story><title>“Zombie cicadas” infected with mind-controlling fungus return to West Virginia</title><url>https://www.cbsnews.com/news/zombie-cicadas-infected-mind-controlling-fungus-west-virginia/</url></story>