David Karp

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Mr. Karp is the spartan and eclectic founder of Tumblr, the early blogging platform used by millions to create virtual scrapbooks for fashion, humor and a myriad of personal interests. Though Tumblr’s user growth has flatlined since Yahoo’s acquisition, Mr. Karp’s mark on social media is permanent and undeniable. Without the cult of personal curation that Tumblr spawned, there would be no Pinterest or Instagram.