"Each philosopher is a node in the network and the lines between them (or edges in the terminology of graph theory) represents lines of influence. The node and text are sized according to the number of connections. The algorithm that visualises the graph also tends to put the better connected nodes in the centre of the diagram so we the most influential philosophers, in large text, clustered in the centre. It all seems about right with the major figures in the western philosophical tradition taking the centre stage. (...) A shortcoming however is that this evaluation only takes into account direct lines of influence. (...) This is a fantastic resource which stores structured information extracted from wikepdia in a database that accessible through the web. Among other things it stores all of the information you see in an infobox on a Wikipedia page." - Amira

it's like their social graph... as if they were all on Twitter concurrently :-) - Adriano