Gazidis called on English football to learn from Major League Soccer and co-operate more closely for the benefit of all.
The former MLS deputy commissioner said: "That's a league which does not have massive television revenues and, yet, in the space of the last decade, they have built across the US and Canada 15 new stadiums.
"They have put that infrastructure in place and I believe they've done that because, culturally, they've been able to think of each other not only as competitors but also as partners, and think very strategically about what they need to do in order to put in place the elements they need for future success.
"Football has not been good at that. It's not culturally part of our DNA and it's something that we need to work on.
"We need to work together to find solutions, because we're much, much stronger together."