In 1784, Immanuel Kant answered Pastor Johann Friedrich Zöllner’s question with the definition of “What is Enlightenment?” that remains valid to this day. Moses Mendelssohn’s response also helps us understand. It seems as though this question needs to be rephrased today: “Where has [the Age of] Enlightenment gone?”
A (modest) start would be made if intellectual visionaries appeared on the world stage who, in the spirit of polymaths, would clearly describe the state of the world and humanity and develop a vision for a better future for all.
This excerpt captures a profound unease I have felt for years. Kant’s famous essay Beantwortung der Frage: Was ist Aufklärung? famously begins with the imperative Sapere aude! – “Dare to know!” Enlightenment, for him, was humanity’s emergence from self-imposed immaturity, the courage to use one’s own reason without guidance from priests, kings, or tradition. Mendelssohn, writing in the same Berlin journal, emphasized enlightenment as both intellectual and practical progress: the refinement of reason and the improvement of society. Together, they painted a picture of mankind evolving toward autonomy, rationality, and moral responsibility.
Yet looking at the 21st century, one cannot help but ask: where has that bold, optimistic spirit gone?
Philosophical, Religious, and Sociological Threads in Humanity’s Evolution
Philosophically, the Enlightenment marked the decisive shift from heteronomy to autonomy. Thinkers like Kant, Locke, and Hume insisted that reason, not revelation or inherited authority, must be the ultimate arbiter of truth. This philosophical maturation mirrored humanity’s broader evolution: from mythological worldviews to scientific inquiry, from tribal loyalties to universal ethics.
Religiously, the Enlightenment was revolutionary yet nuanced. It did not seek to abolish faith but to liberate it from dogma. Voltaire’s battle cry, “Écrasez l’infâme!” targeted fanaticism and institutional coercion, while Lessing (a close contemporary of Mendelssohn) championed religious tolerance in Nathan the Wise.
The result was a secular public sphere where diverse beliefs could coexist under the rule of law rather than the sword. This religious maturation allowed societies to move beyond theocratic control and toward pluralism – a sociological prerequisite for modern democracies.
Sociologically, the Enlightenment thinkers diagnosed the structures that kept humanity immature: feudal hierarchies, censorship, and uneducated masses. Rousseau’s Social Contract and Montesquieu’s Separation of Powers laid the intellectual groundwork for revolutions in America and France. Education became a public good, not a privilege.
The public use of reason, as Kant distinguished it from private obedience, created the “bourgeois public sphere” (as Jürgen Habermas later called it), where citizens could debate as equals. Mankind’s sociological evolution – from subjects to citizens, from scarcity-driven survival to rights-based dignity – is unthinkable without this period.
Enlightenment Ideas Meet Today’s Crises
Fast-forward to 2026. The maelstrom of distribution struggles and archaic power politics dominates global discourse. Climate catastrophe, artificial intelligence ethics, mass migration, algorithmic manipulation of truth, resurgent authoritarianism, and proxy wars all scream for rational, long-term solutions. Instead, we see leaders trapped in zero-sum games: fighting over resources, borders, and electoral cycles while peddling nostalgia for national greatness or ideological purity.
Apply Kant’s categorical imperative today: act only according to maxims you could will to become universal law. How many current policies – from short-term fossil-fuel subsidies to surveillance capitalism — would survive that test? Mendelssohn’s call for practical enlightenment would demand that religious communities, instead of retreating into identity politics, engage in interfaith reason-giving that strengthens social cohesion rather than fracturing it.
Sociologically, we have regressed into what Kant would call “self-incurred immaturity” 2.0: not because we lack information, but because we drown in it. Social media echo chambers, populist demagogues, and conspiracy theories replicate the old guardians Kant warned against — only now they wear digital robes.
The evolution of mankind has brought unprecedented technological power; yet without Enlightenment discipline, that power risks turning us back into dependents on algorithms and strongmen.
How Enlightenment Principles Could Solve Today’s Problems
Imagine political leaders who actually reflected on these ideas instead of remaining trapped in the struggle over distribution and archaic notions of power.
- Reason over Rhetoric: Evidence-based policy-making would replace performative outrage. Climate targets would be set through global, transparent deliberation (Kant’s “cosmopolitan right”), rather than through national bargaining. AI regulation would prioritize human dignity and autonomy rather than corporate or state control.
- Tolerance and Pluralism: Religious and cultural differences would be navigated through rational public discourse rather than through cancellation or identity essentialism. Mendelssohn’s vision of enlightenment as moral and intellectual improvement could inspire the renewal of interfaith and intercultural academies that train future leaders in empathetic reason.
- Education as Emancipation: Universal, high-quality civic education focused on critical thinking, scientific literacy, and ethical philosophy would counter misinformation. Kant insisted enlightenment is a collective, gradual process; we have the tools (open-access knowledge) but lack the political will to make it truly universal.
- Perpetual Peace Revisited: Kant’s 1795 essay Zum ewigen Frieden proposed a federation of free republics, hospitality to strangers, and transparent covenants. Today’s leaders could replace balance-of-power realism with binding international institutions that treat humanity as a single moral community — exactly what is needed for pandemic preparedness, nuclear disarmament, and equitable global development.
- Polymath Visionaries on the World Stage: The modest start Kant and Mendelssohn implicitly called for is still possible. We need public intellectuals who combine scientific rigor, philosophical depth, and sociological insight – modern polymaths who refuse to be siloed. Their task: describe reality without ideological distortion and articulate a positive, inclusive vision of human flourishing.
If today’s leaders stepped out of the maelstrom of short-term power and distributional conflict, they would discover that Enlightenment ideas are not relics – they are the most powerful tools we possess for navigating complexity. Reason, autonomy, tolerance, and progress are not Western luxuries; they are humanity’s hard-won inheritance and its best hope.
The question “What is Enlightenment?” was never meant to be answered once and for all. It is a perpetual challenge. The real question for our generation is whether we still possess the courage to live up to it – or whether we will let the age of reason slip quietly into history.
In my book The Mindful Revolution, I explore this next evolutionary step for humanity precisely. By combining individual mindfulness with a deeper understanding of societal complexity, the book shows how each of us can cultivate the inner clarity and rational autonomy that Kant demanded, while contributing to a collective shift toward a more conscious, compassionate, and sustainable world. True enlightenment in the 21st century must begin within ourselves before it can reshape our politics and societies.
I remain hopeful that new visionaries will step forward.