ions, deployment options and usage models can be figured into them. We then analyzed the key stakeholders who provide roadmap input, and studied different factors influencing network roadmaps, including disruptive factors, as well. Roadmaps are a very powerful tool to develop network capabilities in a planned manner. Developing expertise in defining and delivering network roadmaps goes a long way toward consistently deploying successful networks. CHAPTER 5 Network Roadmap Evolution Owing to this struggle for life, any variation, however slight and from whatever cause proceeding, if it be in any degree profitable to an individual of any species, in its infinitely complex relations to other organic beings and to external nature, will tend to the preservation of that individual, and will generally be inherited by its offspring I have called this principle, by which each slight variation, if useful, is preserved, by the term of Natural Selection, in order to mark its relation to man's power of selection. The Origin of Species Charles Darwin After a diligent inquiry, I can discern four principal causes of the ruin of Rome, which continued to operate in a period of more than a thousand years. I. The injuries of time and nature. II. The hostile attacks of the Barbarians and Christians. III. The use and abuse of the materials. And, IV. The domestic quarrels of the Romans. The History of the Decline and Fall of the Roman Empire Edward Gibbon According to Darwin's Origin of Species, it is not the most intellectual of the species that survives; it is not the strongest that survives; but the species that survives is the one that is able best to adapt and adjust to the changing environment in which it finds itself. 'Lessons from Europe for American Business -Leon C. Megginson Most living things, evolution experts point out, survive and flourish due to two critical factors. First, the organism is so exceptionally designed for its environment that it continues to flourish in spite of many changes that push other organisms out o