"There is nothing new in the world, except the history u don't know " says a proverb. It is correct. "Man is a social animal " said an ancient scholar and humans have been always creating social networks -tribes, communities, associations to name a few. But the social network of FB or LinkedIn are very different from the previous ones - they are electronic variety. "Gift of technology" says an expert is the next best gift after the Gift of Life. Very true