
"Gathered here are the 6.7 billion grains of rice, a grain for each person on the planet". That's how the
Stan's Cafe 'performance' was described as we entered the disused factory in Birmingham. It was first performed at Warwick Arts Centre in 2003 and it has since traveled the world. It was inspired by a desire to get a better understanding of the world and our place in it -- through the visual representation of people by rice!
The organizers explained that rice was chosen to represent people for its size, shape, regularity and granular form. Using the Office of National Statistics, they counted/weighed out the rice to show different data points, such as the number of Welsh speakers in Argentina (a lot!), the number of prisoners in the world (almost the same as the number of millionaires), the number of people the hugging saint has hugged (you wouldn't believe it) and the number of people who listed 'Jedi' as their religion in the last census (at least half a million)!
Here are some examples. The picture below is the population of Pakistan (small) compared to the population of India (very large).

The picture below is very, very sad. It's the number of McDonald's customers worldwide in one day! Yes, one single day. To put this into context, this pile was about the same size as the population of England - that's approx. 45 million.

The picture below compares the number of people born in Australia now living in the UK (left) versus the number of people born in the UK now living in Australia (right).

And this is the population of Las Vegas.