[simiones]

Sure - but there are far more warmongers who failed than those who succeeded - at least out of those who weren't already very powerful (for example, America's recent warmongering has tended to have either almost no effect or a positive effect on itself, since it has been extremely powerful compared to the countries it invaded).

[V-2]

If you won, say, 5 wars (which - yes - will put you in a small minority, because some countries had to be losing these wars, and obviously the losers outnumber you), then you can afford losing another 2.

But if you only ever lost 1 or 2 wars, you're no longer on the world map.