Fleming, who played in 4 World Cups from 1996 to 2007 (3 as captain - 1999, 2003 and 2007), said skippers will be in focus at this year's showpiece event and it was important for Dhoni and others to be attacking in order to win matches.
"The attention will be very much on (Brendon) McCullum, along with the other captains, as I believe cricket is the only major sport left where on-field leadership remains fundamental to the outcome of a match. There is no earpiece to the coach and the buck stops with the man in charge," Fleming wrote on International Cricket Council's (ICC) website today.
"I enjoyed that challenge and the responsibility, and I know that good captains grasp the nettle. Just look at the way MS Dhoni pushed himself up the batting order in the 2011 final as a prime example of that idea," he added.
Fleming, who is Chennai Super Kings (CSK) team coach, spoke about his relationship with Dhoni during the Indian Premier League (IPL).
"Positivity and decisiveness like that can galvanise a team"
"My relationship with Dhoni at Chennai gave me the chance to talk with him about that decision and he said it was an instinct, that is was his time to lead from the front.
"Positivity and decisiveness like that can galvanise a team, whereas hesitancy can flow through each player and create paralysis. And in ICC Cricket World Cups, where the matches come thick and fast and momentum and winning confidence can be crucial, that is a key point to remember," Fleming said.
Dhoni, who promoted himself to number five ahead of Yuvraj Singh in the final against Sri Lanka, remained unbeaten on 91, winning the World Cup with a six at Mumbai's Wankhede Stadium. He was adjudged Man-of-the-match as India chased down 275 with 6 wickets to spare.
Fleming is the second most capped ODI captain (218) after Australia's Ricky Ponting (230). New Zealand reached the semi-finals in England in 1999 and the West Indies in 2007, and the Super Sixes in South Africa in 2003.
In 33 World Cup matches, Fleming scored 1,075 runs at 35.83 with his best score of 134 not out being against South Africa in the 2003 Cricket World Cup.