Why Do American Mortgages Keep Shaking the World? --FDR's Great Achievement--

—FDR's Grand Design and Its Metal Fatigue


This article is a companion piece to the one I wrote recently, linked below.

In explanations of the Lehman Shock, one often sees the phrase, "It was a financial crisis caused by American mortgages." However, that never quite sat right with me.

Why mortgages? Why could the mundane act of "buying a home" become the epicenter that shook the global economy, rather than stocks, government bonds, or corporate loans? This question could not be answered by textbooks or movies alone.

■ Perhaps not liked in Japan, but

There is a figure here who cannot be ignored. Franklin D. Roosevelt (FDR).

He was the only president in American history to be elected four times and is considered one of the greatest presidents in U.S. history.He led the United States through the unprecedented crises of the Great Depression and World War II with strong leadership, guided the war to victory, and propelled the U.S. to the status of a superpower. On the other hand, he adopted a liberal path in domestic policy, and it is no exaggeration to say that he laid the foundation for the current Democratic Party. In Japan, FDR is often discussed in the context of being "the leader of the enemy nation during the Pacific War, the president who drove Japan to defeat," but

from the perspective of national design, his administration possessed an extraordinary level of perfection in American history. What is important is that FDR's reforms were not merely "idealistic theories."

■ Reforms during the Great Depression were incomplete

The New Deal policies that FDR implemented during the Great Depression did not function universally or immediately at the time. Unemployment measures, financial regulations, social security, and public infrastructure investment—many of these also appeared to be stopgap measures to get through the moment. But in reality, he was looking toward the "post-war" era. It is an extremely modern political orientation: "

The state does not distribute everything directly. There are no cash handouts. Instead, we create access circuits to education, housing, and employment.." This philosophy was an unfinished blueprint during the Great Depression.

■ After the war, that design blossomed all at once

Post-WWII America obtained ideal conditions that could never be replicated: an untouched mainland, a thick block of young population, overwhelming industrial power, the status of a victor, and the overwhelming hegemony of the dollar.There, FDR's philosophy was implemented into reality as a "finished form" all at once. Access to higher education and housing support through the GI Bill, long-term low-interest mortgages, the securitization of mortgages, and the diversification of loan risks using global capital are concrete examples of this. In particular, the act of Americans buying homes became a civilizational apparatus directly linked to the credit of the American state and global finance. In other words, the suburban lawn and garage were the crystallization of a system that fully utilized the position of a victor.

■ Mortgage civilization

American mortgages are not just financial products, but a social apparatus of a hegemonic state that sucks up global capital and stabilizes the American middle class.Because mortgages were incorporated into financial products, the Lehman Shock was a "natural consequence" over 60 years in the making. Finance didn't overdo it. It was designed that way from the start.

■ And the "turning point" indicated by the latest article

The latest article from The Economist that I read yesterday, linked below, says something quiet but decisive.

https://economist.com/finance-and-economics/2026/01/07/is-it-better-to-rent-or-buy

Younger Americans are starting to think, "In modern America, it is more rational to rent than to buy a home. Long-term interest rates will no longer fall. Regulations are leaning toward renters. The meaning of placing a mortgage at the center of one's life is fading." This is not just a crisis. It is a sign of institutional fatigue in the ideal American image that FDR built.

The homeownership-centered model designed by FDR assumed a young population, a continuously growing economy, the leeway of a victor, and low interest rates. If those premises collapse, it is natural that the rationality would also reverse.

■ Not a failure. It is metal fatigue

What is important is that this is not "FDR's failure." His grand design stabilized American society for decades after the war (more than one generation), and that supported the world order. As a national system for one country, it was an exceptional success. However, demographics, economic structures, and external environments are constantly changing. No system has a durability that exceeds 30 or 40 years.

What is happening in America now is the process of a civilization centered on homeownership having played its role to the end and now experiencing metal fatigue.

■ Conclusion

The Lehman Shock and the current 'era of renting' in modern America are on the same trajectory. It is a story of how the mortgage-centered national design, envisioned by FDR during the Great Depression and which blossomed after the war, is quietly reaching the end of its lifespan.

FDR may not be well-liked in Japan. However, looking at it objectively, FDR is not a 'failed leader.' It is precisely because he was such an excellent head of state that the world has yet to be designed for a time after his systems have finished their role.

The world I saw in Levittown, Pennsylvania, was truly the final form of FDR's work. As the grandson of a former Japanese soldier, I have finally begun to understand what that means.