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Our American Stories

The LLC, Concrete, and the Index Fund: Fifty Things That Shaped the Modern Economy

Our American Stories

iHeartPodcasts

Documentary, Society & Culture

4.6817 Ratings

🗓️ 2 June 2026

⏱️ 10 minutes

🧾️ Download transcript

Summary

On this episode of Our American Stories, Tim Harford, author of the bestselling book Fifty Inventions That Shaped the Modern Economy, shares the stories behind three transformative innovations: concrete, the LLC (limited liability company), and the index fund. From the concrete that built our cities, to the LLC that revolutionized business ownership, to the index fund that reshaped investing, these inventions changed the way we build, do business, and grow our wealth today.

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Transcript

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0:00.0

This is an I-Heart podcast.

0:02.6

Guaranteed human.

0:14.0

And we continue with our American stories.

0:17.4

Our next storyteller is Tim Harford, an economist and best-selling author of 50 things that

0:23.3

shaped the modern economy. Here he is to tell the story about three of those things, starting with the LLC.

0:32.1

The limited liability company was very important in allowing companies to raise money.

0:38.3

What is essentially true about a limited liability company is that if you and I say decide

0:43.3

we're going to invest in a company and we decide we're going to put $10,000 into a company

0:47.3

and try and get it all started, we may lose our $10,000.

0:51.3

But we can't then be pursued for any more money. Like I've put my $10,000

0:59.4

in, you can't get $20,000 out of me or $50,000 or $1 million if the company does something

1:05.2

wrong. My liability is limited to the amount of money I originally put in. And so having this protection for investors

1:13.7

made it more attractive for investors to put money into companies. It made it easier for companies

1:19.8

to raise money because their investors knew there was a limit to their downside. And that in turn

1:25.1

was important because it meant that suddenly you could raise money

1:28.8

from people who didn't know you. Previously, you would only be able to raise money from very

1:33.1

close friends, from family. So limited liability enables companies to go out and raise money from a large

1:40.5

number of strangers. You think about companies such as General Electric, trying to set up an

1:46.5

entire electricity grid. Or you think about the railway companies. I mean, how is a railway

1:51.6

company supposed to make money? You've got to build an entire railway and you've got to put the

1:55.8

trains on it before you can collect a single dime from any railway passenger. Clearly you've got to raise a huge

2:02.5

amount of money. So the limited liability structure allowed that to be possible. And so you could

...

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