Board Thread:Character Discussion/@comment-26814591-20150724030749/@comment-28398720-20160524154907

Or a tldr kind of answer, killing finn
 * 1) Formalized the alliance with grounders, preventing a massacre by the thousands of Grounders that were camping outside of camp Jaha.
 * 2) Saved Finn the agony that was in store for him in the grounder ritual.
 * 3) Showed Clarke inner strength and open the door for Clexa trough shared experiences..

But we digress from the thread topic.