The Moral Decay Index (MDI) is a data-driven framework for measuring the social and ethical health of the United States across eight key indicators. Rather than relying on partisan political commentary or ideological claims, the MDI tracks quantifiable trends in community life, family formation, public safety, civic engagement, and public health — and updates its scoring as new data becomes available.
Why a Social Health Index?
America in the 2020s is awash in political commentary about moral decline — from pulpits, cable news studios, and social media feeds. The problem is not that the subject is being discussed. The problem is how it’s being discussed: with heat and ideology rather than data and rigor.
The Moral Decay Index was created to answer a simple question: What does the data actually show?
When commentators claim America is in moral decline, are they right? When critics dismiss such claims as nostalgia or culture-war politics, are they right? The only way to answer these questions honestly is to define measurable indicators, collect reliable data, and report what the numbers show — including when they complicate our preferred narratives.
The MDI draws on data from the CDC, FBI, Gallup, Pew Research Center, the U.S. Census Bureau, and other established research institutions. Every data point is sourced. Every trend is contextualized.
The Eight Indicators
The Moral Decay Index tracks eight domains of social life that researchers have consistently identified as markers of community health.
1. Church Attendance and Religious Participation
Weekly church attendance has fallen from 44% (2000) to 22% (2024). This matters not for theological reasons but for civic ones: religious congregations are America’s single largest source of social capital, volunteering, mutual aid, and community cohesion. Their hollowing-out has measurable social consequences documented across multiple fields of research.
Primary data source: Gallup Annual Religion Survey
2. Marriage Rate and Family Stability
The U.S. marriage rate of 6.2 per 1,000 is the lowest since records began in 1867. As marriage rates fall, the institutional support structure for raising children weakens proportionally.
Primary data source: CDC National Center for Health Statistics
3. Non-Marital Birth Rate
40% of American births now occur outside marriage — the highest rate in U.S. history. Children born outside of stable two-parent households face significantly elevated risks of poverty, educational difficulty, and behavioral health challenges on average.
Primary data source: CDC National Center for Health Statistics, National Vital Statistics Reports
4. Violent Crime Rate
After two decades of declining crime (1990–2019), homicide rates surged approximately 30% between 2019 and 2021 before beginning a modest decline. The long-term trend remains better than the crime peaks of the 1990s, but the recent surge reversed years of improvement.
Primary data source: FBI Uniform Crime Reports; CDC injury mortality data
5. Media and Institutional Trust
Trust in media has fallen from 72% in 1976 to 32% in 2023. Confidence in Congress is at 8%. Trust in churches, banks, schools, and the presidency has all declined substantially. Functioning democracy requires some threshold of shared epistemic trust.
Primary data source: Gallup Confidence in Institutions survey
6. Civic Knowledge
Only 36% of Americans can pass a basic U.S. citizenship test. Only 22% of eighth-graders score at or above “proficient” on the national civics assessment. An uninformed citizenry is ill-equipped to hold its government accountable or participate meaningfully in self-governance.
Primary data source: Woodrow Wilson National Fellowship Foundation; NAEP Civics Assessment
7. Drug Overdose Deaths
107,500 Americans died from drug overdoses in 2023 — the deadliest year on record. The crisis is driven by illicitly manufactured fentanyl and reflects underlying conditions of social despair, community breakdown, and inadequate public health infrastructure.
Primary data source: CDC, National Center for Health Statistics
8. Social Capital and Community Engagement
Civic association membership, volunteering, neighborly contact, and social trust have all declined significantly since the 1970s. The Surgeon General declared loneliness a public health crisis in 2023. Social capital is the connective tissue of community life.
Primary data source: U.S. Surgeon General’s Advisory; Bureau of Labor Statistics Volunteering Supplement
What the MDI Is Not
The MDI makes several deliberate choices about what it will not do:
It does not assign blame to political parties. Social trends are structural and multi-causal. Attributing them to one party’s policies is almost always an oversimplification.
It does not advocate for specific policy solutions. The MDI describes what the data shows. Policy debates about what to do about declining marriage rates, or rising overdose deaths, or collapsing institutional trust involve complex tradeoffs that reasonable people disagree about.
It does not rely on opinion surveys alone. Where possible, the MDI uses behavioral data (actual marriage rates, actual crime rates, actual overdose deaths) rather than attitudinal surveys. What people do tells us more than what they say they believe.
It does not engage in nostalgia. The MDI does not assume that any previous era of American history was uniformly better. Many aspects of American life have improved dramatically over time. The MDI measures specific indicators of community and social health, not a general claim that the past was superior.
Why This Matters
Social health indicators are leading indicators. They predict outcomes years or decades in advance.
- Communities with high social capital handle economic shocks better.
- Societies with stable family formation produce children who are better equipped for economic and civic life.
- Nations with high institutional trust can coordinate effectively in crises.
- Communities with low overdose death rates have healthier labor forces, lower crime rates, and more functional civic life.
Measuring these indicators honestly — and tracking them systematically — is the only way to have evidence-based conversations about what is working and what is failing in American society.
That is what the Moral Decay Index exists to do.