The Three Lions' 23-man squad for next month's World Cup in Russia is made up of 18 players who ply their trade for a team that finished in the top six this season.
Southgate hopes that this will only be a benefit for his side next month, telling reporters: "I think it's big. We are seeing that with Manchester City having a core of four English players most weeks, United having a core of English players, Liverpool the same.
"Look at the experience [Jordan] Henderson, Alex Oxlade-Chamberlain, Adam Lallana and Trent [Alexander-Arnold] have gained in the Champions League. It was the same for the Tottenham and City boys. They have been in big-match environments where they know what it takes - the commitment and mindset and hurdles to be overcome.
"They are working with top European coaches. There was always an assumption that European coaches will come here and pick foreign players. [Mauricio] Pochettino has gone with an English core - that is a great message for our players. They can feed off of that, and the players they work with."
England's squad is their third-youngest ever for a World Cup finals.