" Communism and socialism were portrayed by their detractors as endangering freedoms of speech, movement, press, etc. Such a portrayal was often used as a means to silence voices critical of elite interests . With the Soviet Union's collapse, proponents of the propaganda model have argued that the functionality and credibility of anti-communism has been fundamentally compromised. Proponents state that new, more functional anathemas have arisen to take its place. Chomsky and Herman argue that one possible replacement for anti-communism seems to have emerged in the form of "anti-terrorism". Summary Chomsky and Herman summarize their theory thus: "A propaganda model has a certain initial plausibility on guided free-market assumptions that are not particularly controversial. In essence, the private media are major corporations selling a product (readers and audiences) to other businesses (advertisers). Model Portfolio Female Professional Modeling Photography The national media typically target and serve elite opinion, groups that, on the one hand provide an optimal "profile" for advertising purposes, and, on the other, play a role in decision-making in the private and public spheres. The national media would be failing to meet their elite audience's needs if they did not present a tolerably realistic portrayal of the world. "

" The first theory of this kind was proposed in 1974 by Georgi and Glashow, using SU(5) as the unifying group. A distinguishing characteristic of these GUTs is that, unlike the Standard model, they predict the existence of proton decay. In 1999, the Super-Kamiokande neutrino observatory reported that it had not detected proton decay, establishing a lower limit on the proton half-life of 6. 7× 1032 years. This and other experiments have falsified numerous GUTs, including SU(5). Another effort to address the first defect has been to develop Preon models which attempt to set forth a substructure of more fundamental particles than those set forth in the Standard Model. In addition, there are cosmological reasons why the standard model is believed to be incomplete. Junior Model Portfolio Within it, matter and antimatter are symmetric. While the preponderance of matter in the universe can be explained by saying that the universe just started out this way, this explanation strikes most physicists as inelegant. "