Fig. (3) Example of the similarity network model and Gompertz' law. Overlay procedure (described in 4). The semi-quantitative approach shows that an increasing number of connections (clustering) eventually leads to some random structure. In the original model of the authors, clustering indicates the increasing number of connections between entities. The present concept of clustering (aging, leading to a decrease of survivors [12, 13];) is considered a parameter of increasing loss of connections between interacting entities (clustering) so that the organization of a living system gradually becomes lost. Accordingly, we suggest that aging is an apparently increasing loss of inhibitory or regulatory connections. The emerging result is an uncontrolled and possibly pathogenic activity of the thus affected structure.