body. No distant stars, moons, or other planets can be seen. At most, the indistinct glow of the parent sun may be seen occasionally, moving from horizon to horizon as the planet rotates. In this environment, animate physical life generates and evolves in a broadening cycle. Where no such shield has developed and remained for a significant period, no animate physical life is present. Where the shield has decayed or drained off into space, life has deteriorated and died unless intellectual knowledge is sufficient to develop and install an artificial environment. The accepted premise, then, is that all planetary bodies fall into two categories, shielded and unshielded. On the translucently shielded planets, animate physical life may evolve. The unshielded stay barren, devoid of anything but inorganic matter. Only in very rare instances are there any deviations from this rule. Evolving sentient life in these conditions becomes aware of and utilizes first those natural forces directly perceived. Such forces in the order of perception and application are: (1) psionic (creative thought energy), (2) biochemical, (3) nuclear, and (4) gravitational. Electromagnetism is employed sparingly, and remains more as a by-product of other force applications, much like the smoke from a useful fire. The primary needs of these evolving life forms are met through development of the psi force. The first of these needs, communication, is an automatic birthright Transmission and reception of information from individual to individual or from one group to another knows no time-spatiality. Through experience and education, proficiency is gained in other applications of psi, such as movement and conversion of matter, direction and control of lesser species, and communication and association with those in the realms of nonphysical matter. As the intelligent life forms develop into societies and civilizations, the understanding and knowledge of the remaining available forces come quite naturally. Typically, they are the result of the individual's (and the society's) desire to be relieved of the tedium of constant and continuous use of the psi force. Thus mechanical means are created to produce body nourishment, to master and control the planetary environment, to transport matter, to multiply motion, and even to modulate and amplify the psi force. Through the non-matter perceptiveness of psi, the remaining forces are quickly adapted and harnessed to these needs. It is probable that at this stage, the society achieves its first rational contact with other societies