We consider that this project is something that is long overdue. Gerontology needs a holistic view of aging, as well as complex and coordinated effort of research centers. Society is interested in extension of human active life. Moreover, projects assume urgency when scientific and technical development comes to a certain level of scintific knowledge.

Today, gerontology has accumulated extensive knowledge and data bases on aging processes, however, this information is not consolidated in a logical, easily observed, improving and constantly verified form. The diagram, especially developed by many experts from all over the world, will make it possible to consolidate all knowledge on aging, while articles, reports and even monographs – due to their fragmentarity and the limitations of the text information representation - cannot fulfill this task. It should also be noted that the recent development of computer hardware and software has provided effective tools for such diagrams design, as well as for remote teamwork.

Currently, when there are hundreds of hypotheses of the aging nature and mechanisms, as well as a wide range books attempting to synthesize this knowledge, there emerged a necessity of its complex, verified and comprehensible presentation. The HASD diagram is designed to form such a holistic vision for researchers. We hope that it will help to overcome excessive specialization and lack of coordination among modern scientists. Moreover, on the basis of the Diagram, we are planning to build a dynamic aging model that will possibly develop new knowledge.

It should be mentioned that demographic processes of the humanity development also make this approach extremely urgent. It is evident that the developed human aging diagram (and afterwards the model) will incite the development of various means against aging in the whole and its individual negative manifestations. Society needs healthy and active lhuman life extension, as the pension funds burden in the developed countries is already becoming intolerable. This economic problem can be solved by the extension of active life of elderly people, the reduction of negative aging manifestations and, as a result, possible increase in retirement age. Moreover, there is public demand for life extension on the part of a large proportion of the population.