Ancient Europeans wrote about Ages of Man:
http://en.wikipedia.org/wiki/Ages_of_Man
There are also many other references to various types of world ages or Ages of Man in Hopi (worlds), Mayan (suns) and other cultures of antiquity. Giorgio de Santillana, the former professsor of the history of science, mentions approximately thirty ancient cultures that believed in the concept of a series of ages and the rise and fall of history, with alternating Dark and Golden Ages.
More information about the ages is available in the Yuga
theory of the Hindus:
http://en.wikipedia.org/wiki/Yuga
http://en.wikipedia.org/wiki/Satya_Yuga
The theory states that there were no wars in Satya Yuga
(Golden Age). People lived with peace and harmony.
Wars started with the second Age, with only righteous
and justified causes. They were very small in number.
The largest number of them occur in Kali Yuga (age of
darkness) which clouds the mind of most of the people.
It has been astrologically forecasted that the dawn of
Golden Age will occur in about two decades from now:
"From 2010, winds of spiritualism will blow across
the entire world, awakening more and more people
in its wake. Where limits of (modern) science end,
spiritualism begins. .... Along with scientific
progress, intellectuals will start recognizing the
importance of spiritualism. .... From 2050, a new
era will begin...."
Swami Dattavadhut, Prophecies 1998 to 2100, Vanita Books, Mumbai, 1997, pp. 33-42.