Is Government Really Necessary? (video)

The lively Greater Philadelphia Thinking Society discussion happened on December 9, 2012. (http://www.meetup.com/thinkingsociety/events/85461612/) Below is the description of the event on the Meetup page:

Most discussions about government start from the assumption that we need a government, but is that really the case? Will society fall apart without it? At this Meetup we'll consider the issue using the following definition of government: an organization with a monopoly on the use of force within a specified geographical area.

Arguments will be heard pro and con while alternatives will be looked at.