Collectively, we humans are a pretty clever bunch. During our short time on this planet, we’ve split the atom, traveled to space, built the limited slip differential and invented an umbrella for dogs. Yep, all clever stuff. But (most of) these inventions, discoveries and great leaps forward are collective efforts rather than the inspired genius and toil of one lonely, dedicated man or woman. Which begs the question (sort of), of which is the cleverest nation in the world? Which people have contributed the most to our advancement as a species? Which does best at school, and which has the highest IQ. All important contributing factors when deciding where to visit next, no doubt. Luckily though, Vouchercloud has done the legwork for you and diligently researched and ranked the top 25 countries in the world by intelligence.