Complex sentence: According to Blavatsky, the fifth root race is approximately one million years old, overlapping the fourth root race and the very first beginnings of the fifth root race were approximately in the middle of the fourth root race.
Split into simpler sentences: According to Blavatsky, the fifth root race is approximately one million years old. It overlapped the fourth root race and the very first beginnings of the fifth root race were approximately in the middle of the fourth root race.