Welcome.
The names of the playlists of many of the categories in this channel begin with qualifiers such as "Economics -", "Politics -", "War -", f.e. I'm updating this comment on Nov. 25th, 2013, for this formerly said that the best way to view the whole list of playlists in this channel probably was to use alphabetical sorting. That feature now seems to no longer be available, or if it still is, then it's done differently from before and I haven't learned how, yet.
Some of the playlists should be split in order to better categorize video links, but these refinements will come at a later time, if ever. The "War - terrorism - 9/11" playlist is a good example, for it references nearly 200 videos and these links could (and should) be split into separate lists. There unfortunately doesn't seem to be a way to easily do this, so it may possibly be done sometime before 2020, say. :)
Meanwhile, long playlists in this channel won't be very user-friendly you can find, ... as per above.