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Visualization is right at the heart of my own work too.

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I teach Global Health, and I know[br]having the data is not enough.

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I have to show it in ways people[br]both enjoy and understand.

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Now I'm going to try something I've never done[br]before, animating the data in real space,

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with a bit of technical assistance from the crew.

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So here we go, first an axis for health,

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life expectancy from 25 years to 75 years.

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And down here an axis for wealth,[br]income per person 400, 4,000, and $40,000.

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So down here is poor and sick,[br]and up here is rich and healthy.

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Now I'm going to show you[br]the world 200 years ago, in 1810.

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Here come all the countries Europe brown,[br]Asia red, Middle East green,

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Africa South of the Sahara blue,[br]and the Americas yellow.

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And the size of the country bubble[br]show the size of the population.

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And in 1810 it was pretty[br]crowded down there, wasn't it?

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All countries were sick and poor, life[br]expectancy were below 40 in all countries.

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And only the UK and the Netherlands[br]were slightly better off, but not much.

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And now, why start the world.

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The Industrial Revolution makes countries in[br]Europe and elsewhere move away from the rest.

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But the colonized countries in Asia and[br]Africa, they are stuck down there.

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And eventually the Western countries[br]get healthier and healthier.

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And now we slow down, to show[br]the impact of the First World War,

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and the Spanish flu epidemic, what a catastrophe.

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And now I speed up through the 1920s and the 1930s,

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and in spite of the Great Depression,

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western countries forge on towards[br]greater wealth and health.

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Japan and some others try to follow,[br]but most countries stay down here.

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Now, after the tragedies of the Second World War,

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we stop a bit to look at the world in 1948.

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1948 was a great year, the war was over,

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Sweden topped the medal table at[br]the Winter Olympics, and I was born.

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But the differences between the countries[br]of the world was wider than ever.

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United States was in the front, Japan[br]was catching up, Brazil was way behind,

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Iran was getting a little richer[br]from oil, but still had short lives.

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And the Asian giants, China,[br]India, Pakistan, Bangladesh and

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Indonesia, they were still poor and sick down here.

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But look what is about to happen, here we go again.

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In my lifetime former colonies gained independence and

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then finally they started to get[br]healthier and healthier and healthier.

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And in the 1970s then countries in Asia and

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Latin America started to catch[br]up with the Western countries.

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They became the emerging economies,

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some in Africa follows, some Africans were[br]stuck in civil war, and others hit by HIV.

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And now, we can see the world today[br]in the most up-to-date statistics.

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Most people today live in the middle,

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but there's a huge difference at the same time between[br]the best off countries and the worst off countries.

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And there are huge inequalities within countries.

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These bubbles show country[br]averages, but I can split them.

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Take China, I can split it into provinces,[br]

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there goes Shanghai.

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It has the same wealth and health as Italy today.

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And there is the poor inline province[br]Guizhou, it is like Pakistan,

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and if I split it further, the rural[br]parts are like Ghana in Africa.

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And yet despite the enormous disparities today,[br]we have seen 200 years of remarkable progress,

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that huge historical gap between[br]the west and the rest is now closing.

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We have become an entirely new converging world,

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and I see a clear trend into the future with[br]aid, trade, green technology, and peace.

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It's fully possible that everyone can[br]make it to the healthy wealthy corner.

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Well what you've just seen in the last few minutes

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is a story of 200 countries shown[br]over 200 years and beyond.

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It involved plotting 120,000 numbers, pretty neat uh?