How to pronounce “thoughtlessness” in English

So at the heart of the current and ongoing environmental decline is this take/make/waste industrial system. Making and supplying the stuff that we humansconsume in our affluence and discard in our thoughtlessness and technology too is a major part of the problem. So our affluence and population.Population is a subject for another day, and I make no effort here to deal with it nor in the book, but I will get to affluence in a little while.