<story><title>Productive on six hours of sleep? You’re deluding yourself, expert says</title><url>http://www.chicagotribune.com/bluesky/originals/ct-bsi-why-we-sleep-matt-walker-20171003-story.html</url></story><parent_chain><item><author>jasonmp85</author><text>I have little knowledge about the truth here but I&amp;#x27;d heard that this sort of warring stuff only ramped up after agriculture became common, no? Why kill other tribes&amp;#x27; members unless they have a hoard of food? I suppose &amp;quot;to reduce competition&amp;quot; is one answer, but if everyone can hunt&amp;#x2F;gather for enough food, the motivation seems reduced.&lt;p&gt;OTOH if I can ignore preparation for winter and just raid your village for grain stores, the calculus changes.</text></item><item><author>smallnamespace</author><text>&amp;gt; with friends to socialize&lt;p&gt;Or, sometimes, rival tribes to fight with and kill -- not everything is (necessarily) hunky-dory in every tribal society.</text></item><item><author>wmil</author><text>Not only that, but the 40h&amp;#x2F;week ignores commutes. For some people that&amp;#x27;s an additional 15h&amp;#x2F;week.&lt;p&gt;Also hunger-gatherers lived right beside the people they knew. They just had to step outside to meet up with friends to socialize.</text></item><item><author>lutorm</author><text>Actually, studies have shown that hunter-gatherer societies spent much less than 40h&amp;#x2F;week &amp;quot;working&amp;quot; and had more leisure time than we do. It&amp;#x27;s just recent history that&amp;#x27;s an anomaly...</text></item><item><author>_qbjt</author><text>This is one of the reasons I hate the eight-hour work day. Between that and all of the other shit you have to do in a day (commute, chores, eating, exercise etc.), it seems like there&amp;#x27;s little to no opportunity to just have a life. I know it sounds like first world problems (people used to work 100 hour weeks), but I think our culture needs to change before we can really put the onus on people to improve their sleeping habits. I&amp;#x27;d love to get 7-9 hours of sleep, but I just don&amp;#x27;t have the time.</text></item></parent_chain><comment><author>avn2109</author><text>The usual tribal conflict pattern is to seize territory as a hunting ground. Note that for nomadic tribes, there is no village and therefore no fixed location to raid.&lt;p&gt;E.g. the Comanches had a longstanding war* with the Apaches not because they wanted to seize each other&amp;#x27;s grain stores, but rather because they wanted control of the best buffalo hunting grounds.&lt;p&gt;* Not a war in the sense that we&amp;#x27;d call it today. There were e.g. no organized charges, battle lines etc. Maybe &amp;quot;long slow series of irregular cavalry skirmishes&amp;quot; is more accurate than &amp;quot;war.&amp;quot;</text></comment>
<story><title>Productive on six hours of sleep? You’re deluding yourself, expert says</title><url>http://www.chicagotribune.com/bluesky/originals/ct-bsi-why-we-sleep-matt-walker-20171003-story.html</url></story><parent_chain><item><author>jasonmp85</author><text>I have little knowledge about the truth here but I&amp;#x27;d heard that this sort of warring stuff only ramped up after agriculture became common, no? Why kill other tribes&amp;#x27; members unless they have a hoard of food? I suppose &amp;quot;to reduce competition&amp;quot; is one answer, but if everyone can hunt&amp;#x2F;gather for enough food, the motivation seems reduced.&lt;p&gt;OTOH if I can ignore preparation for winter and just raid your village for grain stores, the calculus changes.</text></item><item><author>smallnamespace</author><text>&amp;gt; with friends to socialize&lt;p&gt;Or, sometimes, rival tribes to fight with and kill -- not everything is (necessarily) hunky-dory in every tribal society.</text></item><item><author>wmil</author><text>Not only that, but the 40h&amp;#x2F;week ignores commutes. For some people that&amp;#x27;s an additional 15h&amp;#x2F;week.&lt;p&gt;Also hunger-gatherers lived right beside the people they knew. They just had to step outside to meet up with friends to socialize.</text></item><item><author>lutorm</author><text>Actually, studies have shown that hunter-gatherer societies spent much less than 40h&amp;#x2F;week &amp;quot;working&amp;quot; and had more leisure time than we do. It&amp;#x27;s just recent history that&amp;#x27;s an anomaly...</text></item><item><author>_qbjt</author><text>This is one of the reasons I hate the eight-hour work day. Between that and all of the other shit you have to do in a day (commute, chores, eating, exercise etc.), it seems like there&amp;#x27;s little to no opportunity to just have a life. I know it sounds like first world problems (people used to work 100 hour weeks), but I think our culture needs to change before we can really put the onus on people to improve their sleeping habits. I&amp;#x27;d love to get 7-9 hours of sleep, but I just don&amp;#x27;t have the time.</text></item></parent_chain><comment><author>zipwitch</author><text>I am not an anthropologist, but I believe that&amp;#x27;s a popular misconception. Many technologically  primitive tribal cultures have low absolute numbers of violent deaths, but they also typically have very low populations compared to agricultural societies. Their per capita casualties from intra- and inter-tribal violence are quite high.</text></comment>