Atlantis, Lemuria, prophecies, present & past catastrophes, A.I., roboticism

It is important to understand that Atlantis was spread out across the planet... its main population centre being Poseidonia... a culture composed of many races, which in its golden age was closely linked with the stars, and from there  received enormous technological and advanced scientific knowledge.
Enormous quantities of evidence, remains, Oopart have been discovered all over the planet; gigantic pyramids, monoliths, sarcophagi, remains of giants... Why does official thinking not want us discover that giant beings populated the Earth and  ultimately were destroyed by appalling catastrophes... or perhaps was there another reason related to their degeneration that led to their destruction while the planet went through a new deglaciation of geographical and magnetic poles?
Our ethnic and genetic origins are linked to an earlier supercontinent called Lemuria or Mu located in the centre of the Pacific Ocean, of which there are preserved pockets in South America, Easter Island, the Maldives, Tibet and even Australia itself. Were its inhabitants, for the same reasons of social degeneration, destroyed by tidal waves, volcanoes, meteorites, hurricanes and earthquakes?
As far as we can deduce, we are faced with a similar situation that involves all of humanity... that is why we are describing the infinity of catastrophes that are taking place; earthquakes, tornadoes, typhoons, cyclones, as well as powerful hurricanes and storms which destroy everything in their path while much of humanity ignores the results, and more because the planet is going through a transforming process of geomagnetic mutation as occurred previously. Is this an indication that we are following the same steps of ancient cultures who because of their arrogance and contempt for internal principles and universal cosmic laws ended up being destroyed? How can we reduce the effects of such sinister calamities if we are at the end of time as great visionaries have been referring to for centuries?