sentences:  This sequence is different from the one described in Part I, where the sequence is memory, reason, and imagination.It is the sequence a mind left in isolation or the original generation follows whereas in Part II he describes the progress of human knowledge in the centuries of enlightenment that started from erudition, continued with belles-lettres, and reached to philosophy.Instead of writing in terms of general ideas, d'Alembert provides the dates, places and people responsible for the progress of literary works since the Renaissance leading up to his date.