Dictionary.com lays out several definitions:
As well as an idiomatic definition which is closer to the way the word is often used by LW members who also read Moldbug:
play politics, a. to engage in political intrigue, take advantage of a political situation or issue, resort to partisan politics, etc.; exploit a political system or political relationships.
b. to deal with people in an opportunistic, manipulative, or devious way, as for job advancement.
I believe that definition #5 is clearly what Eliezer is talking about when he says "politics is the mind-killer." h-H is talking about #1, #2, and possibly #3 and #4.
I'm not saying my suggested rephrasing is what most people mean by "politics." But I don't believe anybody is saying that the art or science of political government is the mind-killer.
FWIW, I've always understood the referent for "politics" in "politics is the mind-killer" to be, not political principles or opinions (which in fact get discussed here all the time, typically civilly and sometimes usefully), but tribal affiliation with powerful governmental/nationalist camps. I often refer to it as "partisan politics" for that reason, and around here I sometimes refer to it as "Blue/Green politics." (Both formulations of which neglect the nationalist aspect, but not for any principled reason, just fo...
Original at Washington Examiner
http://washingtonexaminer.com/down-with-politics/article/2508882#.UGSscI0iYZm
Repost at Reason.com
http://reason.com/archive/2012/09/25/why-politics-are-bad-for-us