As we gear up for Valentine's Day, Devex is celebrating power couples making an impact on today’s most pressing global issues.  Check out our list of seven top power couples in development, and chime in with any we missed using the hashtag #DevCouples.

As his fame as an author and humorist grew, Mark Twain increasingly gained access to the most glittering palaces and persons in the world.(...)He was, as he was fond of saying, “not an American, but the American,” and during his many trips abroad he functioned as a one-man diplomatic corps, employing his characteristic blend of self-deprecation and understated wit on foreign people everywhere.

Europe is launching a major diplomatic push for an ambitious deal on global warming, mobilising A-list celebrities and tens of thousands of diplomats to exert “maximum pressure” on key countries in international climate negotiations.

Clooney found his match in a woman of high intelligence, cosmopolitan elan and Muslim heritage. Hmmm. President Clooney. First Lady Amal. American soft power at its best.

With the India story growing worldwide, it is not farfetched to imagine that Indian stars could eventually exert influence beyond the diaspora when it comes to politics.

Pop-music icon Janet Jackson was in Palestine on Sunday during a visit to Occupied Jerusalem with her Qatari billionaire husband Wissam al-Mana.  Jackson, also a UNICEF goodwill ambassador, posted pictures on her Twitter account of herself posing with “beautiful Palestinian students.”

Over 400 producers and chefs from all over the country have gathered for the Food Summit which is being run with Good Food Ireland at this year’s conference.  “What we are doing at the Food Summit is not just important for each individual business, but for the reputation of the whole country as a food island.”