Spiritual fulfillment like most things loses its individual necessity when the totality is embraced. There is no need to find god for the individual, there is no personal quest. Becoming part of the social advancement lends itself to a certain acceptance that not only is the individual no more important than other individuals, the individual matters as a member of the whole.
All actions have innumerable ripples through space-time, so a personal belief that individuality shapes the totality can become enough. When all actions have by definition unforeseeable and unending consequences, the quest of the individual seeking eternal existence, or salvation, or both, becomes one of the individual participating in (contributing to) existence of the whole.