People often think of Silicon Valley technology firms as an industry that popped up independently and wants less regulation, but historian Jeannette Estruth, an assistant professor of history at Bard College wants to remind you that Silicon Valley is in many ways a federal and state project.

“Its roots are totally enmeshed with the government,” she said, in particular to war efforts of the 20th century. She pointed to federal investment in Bay Area universities during and after World War II, and how closely tied their growth was to war. Research and knowledge production from the war made the explosion of growth possible.

“People don’t think about infrastructure,” Estruth said, noting how important the housing boom following the war, and later the expansion of the San Jose airport, were to Silicon Valley’s story.

Now, with Facebook CEO Mark Zuckerberg’s congressional hearing and democratic presidential candidate Elizabeth Warren’s plan to break up big tech, Estruth thinks that we might be entering a new era of increased accountability and oversight in Silicon Valley.

Check out the six unexpected moments that Estruth says shaped today’s Silicon Valley:

1. Modern Silicon Valley developed as a result of the infrastructure build-up of World War II.

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Foto: World War II B-25 Bomber under construction in Inglewood, California.sourcePhoto by Alfred T. Palmer/Getty Images

During World War II and the following years, the classic Cold War research university exploded, according to Estruth. Stanford University and UC Berkeley became part of knowledge creation in geography, chemical weapons, surveillance, and computation.

Foto: Control panel linear accelerator.sourcePhoto by Nat Farbman/The LIFE Picture Collection via Getty Images

With the US presence in the Pacific theater of the war, the West Coast became an important center of shipbuilding, transportation of troops and material, and food. People, money, and resources were moving through the area and in university spaces, setting the stage for a tech boom.

Men from other parts of the country moved through the Bay Area for jobs or on their way to fight in Asia, and some of them saw a place they wanted to settle in the future. People stayed or moved after the war, and large quantities of housing were built.

Foto: San Jose, California tract housingsourceJoe Munroe/Hulton Archive/Getty Images

2. After the war, Stanford went through a budget crisis. Leland Stanford Jr. had placed all university land around Palo Alto in trust, meaning it couldn’t be sold.

Foto: sourcePhoto by Jamila Mimouni/Sygma/Sygma via Getty Images

The land could be rented, though, and the administration saw an opportunity to make money by renting university land, often to recent graduates starting businesses or labs. This led to the density of technology companies around Stanford today.

Foto: Stanford University physics labsourcePhoto by Lee Balterman/The LIFE Picture Collection via Getty Images

3. The expansion of the San Jose airport in the 1980s made modern Silicon Valley possible. Fears that Japan was out-competing the US made building business ties between the areas crucial, setting the connection between Asia and Silicon Valley in motion.

Foto: San Jose airportsourcePhoto by Joe Amon/The Denver Post via Getty Images

An airport that had formerly been for small, regional planes was now able to accommodate jumbo jets from Asia, leading to greater exchanges of visitors, knowledge, and investment.

Foto: sourceLucy Nicholson/Reuters

Estruth highlighted this moment as the first time San Jose really took responsibility for the wellbeing of the tech industry, which it would come to be totally tied to.

Foto: sourceGetty Images

4. In 1957, the “traitorous eight” men left Shockley Semiconductor lab to form their own company, Fairchild Semiconductor, which became an industry leader and incubator of other companies.

Foto: sourceWikimedia Commons

The 8 were, directly and indirectly, involved with a number of important tech companies, like Intel and AMD, which became known as “Fairchildren.” Estruth cited this as the moment when a newer, more entrepreneurial generation began taking over Silicon Valley.

Foto: sourcePhoto by Jon Brenneis/The LIFE Images Collection via Getty Images/Getty Images

5. Facebook CEO Mark Zuckerberg’s 2018 congressional testimony marked a new era of accountability. He was questioned about Russian interference in the US election, and Cambridge Analytica’s access to user data.

Foto: sourceAaron P. Bernstein/Reuters

Estruth said she was surprised that this hearing took place, and that it might signal a new period of oversight for big tech.

Foto: sourceAP Photo/J. Scott Applewhite

6. Elizabeth Warren’s proposals for breaking up big tech could signal a new era for Silicon Valley, with greater oversight and regulation.

Foto: sourceSergio Flores/Getty Images