Evidence/Subgroups?

Here's my thesis: Communities give responsibility to individuals to provide direction and leadership for the community. (The language might be changed a bit, but the idea is going to stay the same.)

I'm worried about evidence -- I probably don't have enough passages from the Iliad, and I'm wondering if anyone has ideas for evidence I can use. Also, I don't really know how what type of criteria to divide my evidence into. Should I use the critical perspectives as a guide for the subgroups or use some other way of dividing it up? Any suggestions would be greatly appreciated!

Here's what I have so far:

-Diomedes takes over for Agamemnon - 172

-Patroclus leads in battle - 417

-Hector goes into war for his family - 209/210

-Nestor gives a speech about how the well-being of a community depends on an individual stepping forward - 318