For the Vedic civilization, it is not something that we really need to decipher from old remnants. The traditions and practices that you presently see have been going on for many thousands of years. Its history is well documented in the Puranas, much of which even historians have not researched as well as they should. Through such study it is obvious that the Vedic society has a prehistoric origin. While most of the "living" cultures that we find today, and the most popular religions, are a modern creation in the sense that they have only come about within the past 1400, 2000, and 2500 years with the advent of the Muslim, Christian, or Buddhist religions. However, the Vedic culture goes back much farther. Many scholars have noted the antiquity of the Vedic civilization. For example, in his Discourse on Sanskrit and Its Literature, given at the College of France, Professor Bournouf states, "We will study India with its philosophy and its myths, its literature, its laws and its language. Nay it is more than India, it is a page of the origin of the world that we will attempt to decipher."
In this same line of thinking, Mr. Thornton, in his book History of British India, observed, "The Hindus are indisputably entitled to rank among the most ancient of existing nations, as well as among those most early and most rapidly civilized. . . ere yet the Pyramids looked down upon the Valley of the Nile. . . when Greece and Italy, these cradles of modern civilization, housed only the tenants of the wilderness, India was the seat of wealth and grandeur."
The well-known German philosopher Augustus Schlegel in his book, Wisdom of the Ancient Indians, noted in regard to the divine origin of Vedic civilization, "It cannot be denied that the early Indians possessed a knowledge of the God. All their writings are replete with sentiments and expressions, noble, clear, severely grand, as deeply conceived in any human language in which men have spoken of their God. . ."
Max Mueller further remarked in his India--What It Can Teach Us (Page 21), "Historical records (of the Hindus) extend in some respects so far beyond all records and have been preserved to us in such perfect and legible documents, that we can learn from them lessons which we can learn nowhere else and supply missing links."
On the antiquity of the Vedic society, we can respect the number of philosophies, outlooks on life, and developments in understanding our purpose in this world that has been imbibed and dealt with during the course of its existence. Through all of this, it has formed a commentary and code on all aspects of life and its value, the likes of which can hardly be found in any other culture today. Thus, with age comes wisdom. And the nature and depth of the Vedic wisdom can hardly be compared with anything else that is presently available. Anyone who has taken a serious look at it will agree. It is universally applicable to all.