1) We entered this war because violations of right had occurred which touched us to the quick and made the life of our own people impossible unless they were corrected and the world secure once for all against their recurrence.
From President Woodrow Wilson's Fourteen Points.
The meaning is clear, however, isn't the sentence a bit strange?
Wouldn't one normally use 'would make the life our own people.... unless'?
Wouldn't onw say 'the world made secure...'?
It's formal, rhetorical and dated, so the forms he's using are not the ones we would use in conversation. I would say it differently, but it doesn't sound that strange to me.