Answer:
When Chris Mittelstaedt says, “People like to be part of something bigger than themselves,"
He means that the Association or cluster of individuals whose one among the part an individual need to be. Once an individual is in him selves /her selves he's non-creative or unaccompanied, however once it get-together with an association of individuals, it efficiency increases and he/she could be a part of group/combination/establishment/relationship and not alone.