Thought-Culture; or, Practical Mental Training

alphabets and the evolution of written work. In short, through thousands of centuries of human life, human aspiration, and human growth, the world of men and women emerged as it stands before us and within us today, with all its achievements and possessions.”

The great difference between thought as we find it in humans and its forms among other animals original: "the lower animals" lies in what psychologists have called “progressive thought.” Animals advance very little in their thinking processes, remaining content with those of their ancestors; their thought seems to have become fixed original: "set or crystallized" during the process of their evolution. Birds, mammals, and insects vary very little in their mental processes from their ancestors of many thousand years ago. They build their nests or dens in almost exactly the same way as their ancestors original: "progenitors" did in the Stone Age. But humanity has progressed slowly but steadily, despite temporary setbacks and failures. Humans have striven original: "endeavored" to progress and improve. Those groups original: "tribes" which fell behind in mental progress and advancement have been left behind in the...