A common blueprint shared by all networks.

So, sure there cannot be any commonality between all the different networks we come across of in real life, right?

Detailed maps of the Internet have unmasked the Internet's vulnerability to hackers. Maps of companies connected by trade or ownership have traced the trail of power and money in Silicon Valley. Maps of interactions between species in ecosystems have offered glimpses of humanity's destructive impact on the environment. Maps of genes working together in a cell have provided insights into how cancer works. But the real surprise has come from placing these maps side by side. Just as diverse humans share skeletons that are almost indistinguishible, we have learned that these diverse maps follow a common blueprint. A string of recent breath-taking discoveries has forced us to acknowledge that amazingly simple and far-reaching natural laws govern the structure and evolution of all the complex networks that surround us.

(Albert-Lászlo Barabási: pp. 5-6)

What if there is a common rationale to all networks? What if pursuing the theory of everything is not as far-fetched as many would think? Perhaps network theory would allows us to unify all human knowledge, that holy grail of philosophers and scientists alike.