The imagery of these earlier flaps give little ground to broad extraterrestrial interpretations: they no longer look futuristic in the slightest with their Zeppelin shapes, propellors, flapping wings, masts, ship decking, and humans in contemporary attire. It seems irrefutable that social forces are necessary to account for them. Whatever the ultimate explanations of individual modern ufo flaps prove to be, it is blatant that social forces can be a sufficient cause in creating emotional climates favorable to frequent sightings of things in the sky that are not fully real.