While it's probably true that democracies are unlikely to go to war unless they're attacked, sometimes they are the first to take the offensive.
( ( While ( it ( ( ( 's probably ) true ) ( that ( democracies ( are ( unlikely ( to ( ( go ( to war ) ) ( unless ( they ( 're attacked ) ) ) ) ) ) ) ) ) ) ) ) ( , ( sometimes ( they ( ( are ( the ( first ( to ( take ( the offensive ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (SBAR (IN While) (S (NP (PRP it)) (VP (VBZ 's) (ADVP (RB probably)) (ADJP (JJ true)) (SBAR (IN that) (S (NP (NNS democracies)) (VP (VBP are) (ADJP (JJ unlikely) (S (VP (TO to) (VP (VB go) (PP (TO to) (NP (NN war))) (SBAR (IN unless) (S (NP (PRP they)) (VP (VBP 're) (VP (VBN attacked))))))))))))))) (, ,) (ADVP (RB sometimes)) (NP (PRP they)) (VP (VBP are) (NP (DT the) (JJ first) (S (VP (TO to) (VP (VB take) (NP (DT the) (NN offensive))))))) (. .)))
Democracies will probably go to war just over economic issues.
( Democracies ( ( ( will probably ) ( go ( to ( ( war just ) ( over ( economic issues ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Democracies)) (VP (MD will) (ADVP (RB probably)) (VP (VB go) (PP (TO to) (NP (NP (NN war) (RB just)) (PP (IN over) (NP (JJ economic) (NNS issues))))))) (. .)))