Explaining that creativity is the true investment capital of the future, inventor Daan Roosegaarde’s optimism for the future hinges upon the power of human imagination. Roosegaarde himself, under the name Studio Roosegaarde, has invented wondrous things—from a Van Gogh’s “The Starry Night”-inspired green energy bike path in the Netherlands to a working smog vacuum cleaner in Beijing. Roosegaarde’s futurism applies to tangible needs and stems from asking why. He also makes clear, sometimes inspiration strikes from dire circumstances. Watch his talk at TED for more inspiration.