the seven sages

Hi, I am an Belgian student (so I am sorry for possible mistakes in my English) and I have to discuss "The Seven Sages" written bij W.B. yeats. The problem is that I am not a very good analiser of poems. So what I am trying to say is that maybe some friendly people can tell something that can help me with explaining and analysing this poem.

here is a link to the poem: http://www.online-literature.com/yeats/809/

First look up all the names, and then maybe you can get an understanding of who he is talking about. One must also look up what a Whig is, in order to have any understanding of the poem.