doctrinal .Level , the idea of intra-war deterrence has been introduced both through the ooncept of flexible response and through the selective targeling or:tjons concept which is currently being professed by ane State. At the same time" some observers state that waa-fighting is an ireortant component of the dcctrinal bases for nuclear srsenals of sone States. Perhaps the most dramatic question is the risk ol a nuciFar var vhich could be launched by accident , either because of technical faifure or hr:man error. At this particular 1eve1 , vhile the nuclear* 'weapon States have no d-oubt set up control a;nd conmand systeqs lthich are designcd bo m-inimize these risks, the possibiliry of the accidenlal launch of one or fi-eny nuclear wcanons, hovever snall the probabiliLy of s.rch risks, cannot be botally excfuded altogether. 2aq. llisl.o-v indi.qtes T,hpt ^nnF a na]^tinrrlar tv-p ^f uaFhnn hec teen dnveloped past the testing stage it will generally be used. This has not t)een txue of nuclearweapons, with one exception, but there can be no assurance bhat it will remain so, Thus, the doctrine of nuclear d.eterrence reltains open to the criticism tha.t, given the nature of these weapons, the risks of the failure of deterrence are correspondingly higher" It may be argued that they aJe too high to be worth Laking" -Lr rhese circunstances, some States prefer Lo base their security on the rather hazardous concept of the balance of terror, naintaining that the urgent priority is to nake jt as stable as pcssible. The naiority of international society believes hovever that this is iI1usory, in terns of securing a pennanenL and secure systen of world peace. C. Doctrines and. technological deve-fg!49ql 2)9. The sLraLegic uinciples urderlying the threat of possible use of nuclcar veapons may be regarded as having become inereasingly sophisticated as the range
**Analysis**
The text appears to be discussing the concept of nuclear deterrence and the risks associated with its failure, as well as the potential consequences of a nuclear war. The language used is technical and refers to specific military strategies and concepts, such as "flexible response" and "selective targeting". The text also touches on the idea of international relations and the balance of power between nations. Based on this, it seems likely that the text is related to international relations and security rather than any of the other categories.

**Category**
Science and technology, International relations