You don't, no.

[Garrus shot him another look-- a kinder, softer one than the ones he'd given his human friend before, but still with enough of a sharp edge to make his point clear: he was being honest]

If you think about it, that's how these things go. One war trails off and explodes into another one. Sure there's a stretch of time, centuries if you take a look at the galaxy as a whole, but the fact of the matter is, old wounds are gonna run deep and they're gonna be reopened one way or another.

[He took a swig of his drink with a huff]

It's good job security if nothing else.