Vanguard doesnt have a lot of global equity funds except for Vanguard Global Equity, so if you're up for an aggressive global fund, thats about it. A little 'expensive' at a ~.7 expense ratio, but thats probably cheap as global funds go.
The target retirement series focuses primarily on US equities, although some of the later versions have a smattering of european and far east stocks. They become less aggressive as they 'age'.
Lifestrategy funds have about the same mostly US centric focus, but remain at the same risk level as time passes.
Be fearful when others are greedy, and greedy when others are fearful. Just another form of "buy low, sell high" for those who have trouble with things. This rule is not universal. Do not buy a 1973 Pinto because everyone else is afraid of it.