Interview with Dennis Ritchie (2003)

The visible things that have come from the group have been the Plan 9 system and Inferno, but I hasten to say that the ideas and the work have come from colleagues. At the same time, much of it seems to have to do with recreating things we or others had already done; it seems rather derivative intellectually; is there a dearth of really new ideas? Unix was basically his, likewise C’s predecessor, likewise much of the basis of Plan 9 (though Rob Pike was the real force in getting it together).

Source: anders.unix.se