"Would you agree that everything must perish, or change form in time?"

Yes.But in what form that is,is'nt allways the way we have allways known...or instantly perceive we know.
What about a one who live to 969...you know his name?
Who holds the keys to eternal life?...but yet they cant make a plant grow or mountains fall?
An 'analogy',these things,you might say but they could translate to physical maatter.
Mere words can change the crystaline structure of things,even scientists know this.

"There has been many mass extinctions throughout the history of the earth. Humanoids have died to make way for others. That is the nature of life."

What do you think affects the electro magnetic feild around the earth?

"The end of the world does not mean the end of the earth itself. The earth is going no where anytime soon."

True...but if you beleive you have little effect on the earth or that you are not part of its consciousness you will know not the time nor the hour.If you look at a calender too much then you may indeed speed the process up or even create it.
Everything to me is an agreement.

"But it is not unprecedented to have a die off of humanity."

Yes...
What powers did the remnant have the last time there was a mass die off?

"There are always remnants however."

Peace

Who feels it knows it.Go anywhere with a joy,not a fear.In joy/love all feeling instincts,intuition function in alignment with the Most High-the 'reality',fear is the illusion.
Island and you drop into the sea, and you a Joy...you are never far from Zion.Go to Africa, in and from a joy...and island you leave drop into sea....still Zion I not far cos a joy.

Blessed.