Graph theory

I don’t know a single example of an entire field being able to be reduced to one area of that field that works better than explicating all of computer science using graph theory. Granted, in some cases you have to stretch it a bit, but it works very well:

So now when I’m having trouble understanding how to do something with computers, now I try and think about the problem in terms of a graph.

When quantum computing theory is better-understood, it will surely involve graphs. Maybe we’ll have superpositional edges and nodes which only exist when observed!