eradicate and exterminate

Example out of "Human being of Earth, it is high time for you to change for the better and for the good ..." by Eduard Albert Meier:
... As a result of this, however, the existence of the entire humankind and of the planet is being put at risk and brought into question, therefore, it may be, that the earthly humankind will eradicate and exterminate itself one day due to its irrationality and due to its unintellect and egoism. ...