normal trend has been(i hope someone supports me on this) sofar:
teams won WC on (1) due to a great captain (2) a gr8 captain supported by a good team...
Now to analyse-
as for teams, all teams at this level are almost equally good.....the difference lies at having a magical captain......
pakistan won due to Imran khan's magical leadership.....
same goes with kapil Dev, Allan border, steve waugh, ricky ponting, ranatunga, clive lloyed.....they had magical leadership skills.......
Why england did not win sofar, simple, they always had great teams (that's why they reach many semis) but not a great captain post 1975.