When we Focus our attention upon something we are able to gain a deeper and clearer insight into it than if we just glance at it in passing.
When a group focusses its attention upon the same thing they are able to gain a much fuller and more well rounded view of it than any individual could attain alone.
Also when we give our attention to a thing, that acts as a focalising influence that enables the thing to come into manifestation.
So the Focus of our attention is what creates the version of reality that we are able to perceive.
Given this understanding we can see how the 'world' in which we find ourselves is primarily the result of the way we focus our attention, as individuals and as groups.