Elon Musk applied a decision-making framework rooted in ancient Greek philosophy to overturn the space industry's most fundamental assumption: that rockets must be expensive. By breaking down a rocket to its raw materials and asking why costs spiraled so high, Musk discovered that inefficiencies in manufacturing and supply chains, not material scarcity, drove prices. This approach, called "first principles thinking," has become the foundation of SpaceX's disruptive business model.

What Is First Principles Thinking, and Why Does It Matter?

First principles thinking traces back to the ancient Greek philosopher Aristotle and involves questioning assumptions that most people accept without examination. Rather than accepting "it's always been done this way," this mental tool breaks problems down to their most fundamental, indivisible elements and rebuilds them from zero.

"Highly capable professionals habitually question 'the obvious' and employ first principles thinking to break things down to their most fundamental elements before reconstructing them," explained Kazuya Nakamura, a data scientist who documented this approach in his book "People Who Can Decide Quickly Succeed."

Kazuya Nakamura, Data Scientist and Author

In the business world, many professionals accept inefficient practices without question. Regular meetings with vague objectives and printing documents that could be digitized are typical examples. Musk, however, applied this thinking to an entire industry. When he founded SpaceX, the prohibitively high cost of rocket manufacturing was treated as an unchangeable fact. But Musk returned to first principles and asked a simple question: "What are the raw materials of a rocket, and what are their market prices?".

How Did Musk Apply First Principles Thinking to Rockets?

The answer Musk discovered was startling. The material costs of aluminum alloys, titanium, copper, and other components that make up a rocket amounted to only a few percent of the finished rocket's price. This insight led him to a revolutionary conclusion: rockets were expensive not because materials were scarce, but because of inefficiencies in the manufacturing process and supply chain.

Armed with this understanding, Musk drastically reduced costs through in-house production and innovative design. The result has been transformative. SpaceX's super-heavy rocket, Starship, currently under development, is expected to reduce orbital insertion costs by at least 90 percent, representing the culmination of cost innovation born from first principles thinking.

How to Apply First Principles Thinking to Business Challenges

• Question Industry Assumptions: Challenge the "it's always been done this way" mentality by asking whether current practices are truly necessary or simply inherited from tradition.
• Break Problems Into Fundamental Elements: Reduce complex challenges to their most basic components, examining raw material costs, manufacturing processes, and supply chain inefficiencies rather than accepting surface-level explanations.
• Rebuild From Zero: Once you understand the fundamentals, reconstruct the solution without being constrained by existing industry conventions or past practices.

What Is SpaceX's Business Model Beyond Rockets?

Having gained cost competitiveness through first principles thinking, SpaceX has evolved far beyond a mere rocket company into a massive technology enterprise targeting both artificial intelligence (AI) and space markets. The company's current business portfolio is extraordinarily ambitious.

SpaceX's ventures now include Mars colonization plans, orbital data center deployment, expansion of its satellite internet business called Starlink, and building a "sovereign AI" platform that encompasses AI models, chip design, and processor manufacturing entirely in-house. According to Morningstar research, the total addressable market for Starlink's consolidated business reaches $129 billion.

Additionally, SpaceX's "Neocloud" business, which currently leases ground-based data center capacity, has already secured contracts totaling over $81 billion with technology companies including Alphabet and Anthropic. Speculation has also surfaced about a possible merger with Tesla, another giant company led by Musk. If realized, this would bring expansion into the autonomous vehicle and humanoid robot markets into view. Morgan Stanley predicts the humanoid robot market could grow to $3 trillion by 2050.

How Does SpaceX Compare Financially to Its Competitors?

While SpaceX dominates in ambition and scale, its financial metrics reveal a company in heavy investment mode. In the first quarter of 2026, SpaceX's revenue grew 15 percent year-over-year to $4.7 billion, but its loss per share widened significantly to $3.29 from $0.41 in the same period the previous year. Behind this massive loss is a sharp increase in capital expenditure. The company invested $10 billion in Q1 2026 alone, demonstrating an accelerating investment pace compared to the $27 billion spent in the full year 2025.

Rocket Lab, a formidable competitor in the space industry, presents a contrasting financial picture. The company achieved Q1 2026 revenue of $200 million, up 64 percent year-over-year, with a loss per share of $0.07, an improvement from $0.12 in the same period the previous year. While still in the red, the loss margin is steadily shrinking. Looking at price-to-sales ratios, Rocket Lab trades at approximately 66x compared to SpaceX's roughly 94x, suggesting relative value. SpaceX is trading at an extremely high premium amid massive investments and widening losses.

Rocket Lab is also pursuing growth through strategic acquisitions. The company recently announced the acquisition of satellite communications giant Iridium Communications, which posted a net profit of $114 million in the previous year. Through this acquisition, Rocket Lab aims to strengthen its satellite communication network to compete with SpaceX's Starlink. The launch business is also performing well, with 31 new contracts secured in Q1 2026, a pace that exceeds the total number of sales for the full year 2025.

The contrast between the two companies reflects different strategic philosophies. SpaceX is betting heavily on transformative technologies and market expansion, while Rocket Lab is focusing on profitability and steady growth in its core launch and satellite communication businesses. For investors evaluating space stocks, the choice depends on whether they believe in SpaceX's ambitious vision or prefer Rocket Lab's more measured approach to building shareholder value.