the war is never good, yes it might reduce the amount of people but it does not help to develop as people destroy other countries and other potentially talented people that means war is stopping the development not making it faster
I'd be willing to bet that war doesn't even put a dent into reducing population size. UNICEF estimates that about 353,000 babies are born each day (source, article from last year so the numbers probably changed slightly). The ongoing war in Syria, which started in 2011, has claimed an estimated 320,000 deaths (source)...and that's over a span of four years!
also you did not answer my question...