Just to clarify some things while we're on the global aspect. Will and Kate's trip to NYC was not an official trip representing the monarch nor was it paid for by the British government and/or taxpayers.
"The couple lives in a palace and is afforded some of the world’s best luxuries, but they’re not above flying commercial. The trip is being funded by Will, Kate and Harry’s charity and St. Andrews University."
William and Kate to take New York City by royal storm | New York's PIX11 / WPIX-TV
However, William's trip to China at the beginning of the year was an official visit representing his monarch and the British people and its government. While his work with United with Wildlife was not a main focus, it certainly was picked up globally and commented on while he was there. I recall seeing a photo of the buildings that presented the images of both William and Yao Ming while he was there. Yao Ming, a Chinese national superstar in both the American NBA and representing China in Olympic games is also involved in several wildlife conservation areas. its interesting to note also that Yao Ming is listed as one of the associates in the United for Wildlife campaign.
These are the strides that I'm seeing that can make a big difference. Its better to hold hands and work together rather than trying to change the world by oneself.