There's many theories (but of course Christians don't have theory, they have truth). Many Buddhists, Hindus, and Native Americans would agree that the purpose of mankind is to ascend in spirituality into a state of "Enlightenment" achieved through meditation, contemplation, concentration, dedication to a god/goddess, and leading a spiritual life. I would like to agree with this, save the fact that the Messiah guaranteed Heaven to the righteous and a burning lake of fire located somewhere in the abyssal realm of the netherworld for the wicked.
Humanists would say, of course, that their own power would guarantee them positive vibrations and some type of peace here on earth and possibly a peace afterwards. Same thing for New Age guys.
Whichever you believe, one thing's for sure: technology is the enemy of mankind, viz. artificial intelligence, nuclear warfare, microchipping, cyborg humans, cloning and human hybridization, and human mutations.
