[@Akayaofthemoon]
[hider=SPOILER: Open if you dare!] Likewise, by the end of it even though he had done some really bad things I felt way too much sympathy, which quite a few people didn't seem to have, for David to let him send himself down the dark road of murder and all the other hardships that would come with it. Though I did want Jefferson to be punished I felt a little sick when David killed him, namely because David just broke down afterwards. As for Nathan I do feel for him, he really does have some demons he should of got the proper help for long ago, and the message he sent did show that there is some good left in him, but I just can't get past how he quickly latched onto Jefferson's lifestyle and tried to become him. Not only did he try to "capture" Rachel which led to her death he also did it to Chloe which just didn't sit well with me. 

As for the stepping in in the beginning I'm pretty sure they said that Max using her powers to save Chloe in the first place is what caused the huge butterfly effect that lead to all the natural disasters. It all has to do with chaos theory and the whole principle of constants and variables. Something always has to happen otherwise disaster will strike. As in the constant of Chloe dying being changed caused a new constant to be created, the storm. It all hurts my brain really just thinking about it.
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