Whenever we are engaged in a conflict, or whenever we are contemplating a conflict which has the potential that this conflict has, we need to realize that it may well be a situation, no matter what the outcome, in which there are no winners and losers but rather a situation in which everybody loses when we choose war as an alternative to diplomacy.
The speaker prefers diplomacy to war 
Clearly he prefers diplomacy 
( z1 prefer :ARG0 ( z2 person :ARG0-of ( z3 speak ) ) :ARG1 ( z4 diplomacy ) :ARG2 ( z5 war ) )