At risk of sounding simplistic, the alternative to non-unanimous decision procedures (the realm of political society) is unanimous decision procedures (the realm of civil society).
Or living without using decision procedures at all, which is quite feasible in small groups under ~150 people. There will always be disagreement about "rights" and the like, but small groups can more easily hash out such disagreements through informal ethics (i.e. managed de-escalation of conflict). Political conflict persay only seems to arise in larger groups.
Can you summarize your reasons for believing that small groups don't use decision procedures, as opposed to believing that small groups use informally specified decision procedures? My experience of decision-making in small groups is that while it can be consensual, it is more often an informal oligarchy... that is, there's a few people who really matter, but nobody ever comes right out and says that.
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