Livre d'Or

Your brother sounds like he's taking the "one vote won't matter so don't bother voting" line! He's completely right, of course, that one person's ethical consumerism makes little to no difference, but he's conveniently overlooking that individuals can be part of a group that causes change.

If I lived in the UK with the first-past-the-post system I'd be cautious about voting Green, too: fortunately here it's preferential so I can vote for the Greens all day long. (They're the only major party opposing our hideous immigration policies.)