OP (Now, that we have robots to do the fighting, is war more likely?). The British Ministry of Defence is asking important ethical and political-military questions about the nature of conflict now and in the future.
My sense is that what they are addressing is an ‘inevitable’ pathway to ever more sophisticated fighting machines, robots, which, if we were ever to enter conflict with a similarly technologically capable society (e.g., China) would escalate to ever more advanced automatons and beyond: Terminators; it would be a race to our own destruction.
We can take comfort that today's robots are human-guided, but, for how long? Each conflict we enter into becomes a little easier because the casualties of war just get buried in the local dump instead of arriving on a regular schedule at Dover Air Force base.