Why Dhoni's value to the team is unparalleled in history of Indian cricket

Indian cricket has never had a wicket-keeper who could double up as a genuine batsman in the manner of MS Dhoni. Add the phenomenal captaincy numbers to the equation and we have a gift to cherish, the like of which the nation has never seen before 

To put this in perspective let us look at Dhoni compared with the regular wicket-keepers of the past.