Paul Allen: The Other Half of Microsoft

Zusammenfassung

Paul Allen spotted the future in a magazine rack and ran to find his partner. The cover of the January 1975 Popular Electronics showed the MITS Altair 8800 — the first personal computer aimed at consumers — and Allen immediately understood what it meant. He dragged Bill Gates to a phone, and within hours they had pitched a BASIC interpreter to a company they had never visited for a computer they had never touched. Microsoft was born from that call. But Allen’s story is not just the founding of the world’s most profitable software company; it is the story of a visionary who was squeezed out before the biggest paydays arrived, built a second life of staggering breadth, and left behind institutions that will outlast his software.

Lakeside School: The Partnership Forms

Paul Gardner Allen was born on January 21, 1953, in Seattle, Washington, the son of a University of Washington librarian father and a teacher mother. He attended Lakeside School, an elite Seattle private school that had done something remarkable in 1968: purchased a computer terminal with a teletype connection to a time-sharing system, at a time when most universities did not have that kind of access.

Allen was fifteen when he encountered the terminal; Bill Gates was thirteen. They came from different places in Lakeside’s social ecosystem — Allen was older, more technically exploratory, less driven; Gates was younger, more intense, already certain that he was smarter than almost everyone around him — but the computer pulled them together. They formed a partnership at the terminal: Allen the enthusiast who wanted to explore every capability, Gates the strategist who wanted to master every technique and then apply it commercially.

The two-year age difference, small in adult life, was significant at Lakeside. Allen was a senior when Gates was a sophomore; Allen was the one who introduced Gates to advanced material, who pushed their shared exploration toward more sophisticated territory. But Gates was dominant in their dynamic despite being younger. He was faster, more aggressive in argument, and more willing to commit fully to a course of action. Allen was visionary; Gates was operational. The combination would prove worth billions, though the distribution of those billions would eventually become a source of grievance.

After Lakeside, Allen enrolled at Washington State University to study computer science while Gates went to Harvard. They stayed in close contact, traveling to Albuquerque to use machines that were unavailable in Seattle, Allen increasingly convinced that the computer revolution Gates had talked about was imminent and that they were positioned to profit from it.

The Altair Moment

In late 1974, Allen was working as a programmer for Honeywell in Boston and periodically visiting Gates at Harvard. In December, walking through Harvard Square, he saw the January 1975 issue of Popular Electronics in a newsstand. The cover read: “World’s First Minicomputer Kit to Rival Commercial Models — Altair 8800.”

Allen bought the magazine and ran. The Altair 8800, built by Micro Instrumentation and Telemetry Systems (MITS) in Albuquerque, was a rudimentary machine — an Intel 8080 processor, 256 bytes of RAM, no keyboard, no display, no software. It communicated through toggle switches and LEDs. But it sold for $395 as a kit, putting a real computer within reach of individuals. And it had no programming language. It needed one.

Allen and Gates had been discussing this moment for years — the point at which personal computers would need software, at which their knowledge of small-machine programming would have commercial value. They had imagined it; now it was here. Allen ran to Gates’s dorm room, showed him the magazine, and they agreed: they would call MITS and offer a BASIC interpreter for the Altair. They did not have BASIC working. They had barely seen an Altair. None of this deterred them.

Gates called Ed Roberts at MITS from Harvard, claiming to be “William Gates of Micro-Soft” (the hyphen appeared first, then disappeared) and said they had BASIC nearly ready. Roberts said if it worked he would buy it. Over the following weeks, working from the published specs for the Intel 8080 and building a software emulator of the chip because they had no actual hardware, Allen and Gates wrote Altair BASIC. When Allen flew to Albuquerque in February 1975 to demonstrate it — the first time he had touched an actual Altair — the interpreter ran correctly on the first attempt.

Microsoft — initially Micro-Soft — was formed as a partnership in Albuquerque in 1975, with Gates taking 60% and Allen 40%; in 1977 Gates renegotiated the split to 64/36. The disparity reflected Gates’s assessment of who had done more of the work on Altair BASIC; Allen, characteristically, did not fight it hard. They moved the company to Bellevue, Washington, in 1979, and the partnership was formally incorporated in 1981.

The Microsoft Years: Vision Without Control

Inside Microsoft, Allen’s role was distinct from Gates’s in ways that shaped the company’s character. Gates managed, competed, and dominated; Allen explored. It was Allen who pushed Microsoft toward the graphical user interface at a time when Gates was skeptical of its commercial potential. It was Allen who first advocated seriously for networking when the company was still primarily focused on programming languages.

The most consequential decision of Microsoft’s early history — acquiring QDOS (Quick and Dirty Operating System) from Seattle Computer Products for $75,000 in 1981 and licensing it to IBM as PC-DOS — was a Gates operation, but Allen was present and involved. The deal that made Microsoft the largest software company in the world came from understanding that IBM needed an operating system and was too proud to negotiate hard over one, then positioning Microsoft as the supplier while retaining the license rights that IBM assumed were worthless.

By 1982, Allen was 29 years old, Microsoft was growing explosively, and he was exhausted. He had been working at Gates’s pace — which was maniacal — for seven years. In the fall of 1982, he was diagnosed with Hodgkin’s lymphoma, a cancer of the lymphatic system. The diagnosis was treatable — Hodgkin’s lymphoma had good survival rates even in 1982 — but the treatment was brutal, and the disease forced a revaluation.

Allen later wrote that he overheard Gates and Steve Ballmer discussing, while Allen was ill, whether they should dilute his Microsoft shares — a conversation that struck Allen as a betrayal at a moment when he was fighting cancer. Whether the conversation was what Allen believed it to be is disputed. What is not disputed is that he departed from Microsoft in February 1983, while he was still in treatment. He retained his shares and seat on the board; he did not return to daily operations.

The Stock Options Dispute

Allen’s departure from Microsoft in 1983 predated the company’s most spectacular growth. When Microsoft went public in 1986, Allen’s stake was worth roughly $234 million; when he died in 2018, it had grown to approximately $20 billion. What rankled was the retroactive revelation of the overheard conversation — which Allen described in his memoir Idea Man (2011) as evidence that Gates had considered reducing his share of what they had built together at the moment Allen was most vulnerable. Gates disputed Allen’s account. The two men reconciled publicly before Allen’s death, but the dispute illustrated the difference in their characters: Gates calculated; Allen felt.

Post-Microsoft: The Visionary’s Second Act

Paul Allen recovered from Hodgkin’s lymphoma, left Microsoft, and began the most unusual second act in the history of technology wealth. Where most technology billionaires focused their post-company energies on a single field — Bezos on space, Zuckerberg on social infrastructure — Allen spread across a landscape so wide it was almost deliberately incoherent.

He founded Vulcan Inc. in 1986 as the holding company for his investments and philanthropic activities. The name was appropriate: Allen was a committed Star Trek fan, and the Vulcan temperament — logical, thorough, encyclopedic — described his collecting and exploring instincts well. He owned the Portland Trail Blazers (NBA, purchased 1988) and the Seattle Seahawks (NFL, purchased 1997), becoming one of the few owners of two major professional sports franchises simultaneously. He was not a passive owner; he invested heavily in both teams’ facilities and operations.

His most technically audacious investment was in Scaled Composites, the aerospace company run by aircraft designer Burt Rutan. Allen funded Rutan’s development of SpaceShipOne, a suborbital spacecraft designed to compete for the Ansari X Prize — a $10 million competition for the first privately funded vehicle to reach the edge of space twice in two weeks. On October 4, 2004, SpaceShipOne completed the second of two qualifying flights (the first was on September 29), winning the prize. Allen had spent approximately $28 million to win a $10 million prize — but the point was not the prize money. It was the demonstration that private spaceflight was possible.

The technology Allen funded in SpaceShipOne became the foundation for Virgin Galactic, Richard Branson’s commercial spaceflight venture, which licensed Scaled Composites’ design. Allen had funded the proof of concept for an industry.

Science and the Allen Institutes

Allen’s deepest philanthropic investments were in science. He gave over $500 million to the Allen Institute for Brain Science (founded 2003), which produced the Allen Brain Atlas — comprehensive, open-access maps of gene expression in the mouse and human brain that became foundational resources for neuroscience research worldwide. The Allen Institute’s approach — systematic, data-intensive, and fully public — was Allen’s model of what philanthropy could do that profit-driven research institutions could not: produce comprehensive foundational data and give it away.

He founded the Allen Institute for Artificial Intelligence (AI2) in 2014, with the explicit goal of pursuing AI research in the public interest — working on problems that were unlikely to be commercially profitable but scientifically important. AI2 has published significant work on scientific reasoning, natural language processing, and AI safety, operating outside the pressures of product development that shape research at commercial AI labs.

The Allen Institute for Cell Science (2014) applied the same systematic, open-access model to cellular biology — building tools and data resources that individual research groups could not afford to build but all could use.

Together, the Allen Institutes represented a theory of philanthropic impact: identify areas where systematic, comprehensive data collection would accelerate science across many groups, fund that collection, and release the results freely. It was, in some ways, the scientific version of the open-source philosophy — the belief that shared infrastructure produces more total value than proprietary infrastructure.

The Question: Who Built Microsoft?

The mythology of Microsoft is Bill Gates’s story, and there are reasons for that beyond mere retroactive fame-attribution: Gates drove the company harder, managed its critical negotiations, and sustained its competitive ferocity through decades of platform wars. The Gates of the 1980s and 1990s — aggressive, dominating, often brutal in his dealings with competitors — was the engine of Microsoft’s growth.

But Allen was something else: the person who recognized the Altair moment, who dragged Gates to the phone, who pushed Microsoft toward the graphical interface and networking years before those bets paid off. His Hodgkin’s diagnosis and departure in 1983 came before Microsoft’s most explosive growth, which means Allen built the foundation and missed the construction. Whether he would have shaped the company differently had he stayed — more exploratory, less aggressively competitive, more inclined toward the kind of open scientific philanthropy he pursued in his second life — is unknowable.

What is clear is that the personal computer revolution that transformed the world had two architects at its origin, not one. The one who stayed got the mythology; the one who left got the second chance.

Paul Allen died on October 15, 2018, from complications of non-Hodgkin’s lymphoma — a different lymphoma from the one that had driven him from Microsoft thirty-five years earlier. He was sixty-five years old. He had donated more than $2 billion during his lifetime and left additional philanthropic commitments in his estate.

For the company they built together, see Bill Gates and Microsoft. For the Altair that triggered Microsoft’s founding, see The Altair 8800.