With stocks to buy on investors' minds, rising tensions in the Middle East and a still-fragile UK economy are raising an uncomfortable question. But if it does, which stocks are actually built to withstand it? Here's what the experts are recommending…The consumer staple that keeps selling regardlessUnilever (LSE:ULVR) makes the household product names people buy out of habit, not choice. And thanks to various self-help initiatives, management has also banked around €750m in productivity savings, running ahead of internal targets. And softer market conditions in Europe, particularly Germany and the Netherlands, have weighed on growth – something investors need to watch carefully.