Life started in simple organisms, whose living power consisted chiefly in their being able to reproduce themselves before dying. But from these humble beginnings came a stream of life which, growing ever more and more complex, has in the end produced being whose lives are largely centered in their feelings and ambitions, their sense of beauty and the religion in which lie their highest hopes and noblest desires.
why the writer not use with instead of in?also, WHY "the" is not used with superlated degrees highlighted in above context