Wells satirically ridicules the knowledge of scientist on EARTH when he compares with that of Martians.
Explanation:
In the excerpt from War of the Worlds, Wells talks about how Martians attack Earth when people, scientists, leaders are all busy and unaware of the situation they must face ahead. He ridicules every one of us of Earth stating that our knowledge, wisdom and education is very less when compared to that of Martians.
In these lines, he says that their calculations of attack, take-over and preparation has started long before we even thought of the word, war. He says that their abilities and practice of those abilities to improve started way before we did. This is our disadvantage and world is now like Martian red weed, is what he says (after the war).