SLEN
New discipline · Institute for Demographic Future

Adaptive
Demography
Theory

Most institutions ask how fertility can be increased. We ask a different and far less explored question: how can people live well in a Europe that is gradually shrinking?

< 1,7
total fertility
rate, Slovenia
2100
IDF scenario
horizon
3
phases of demographic
contraction
“The greatest challenge of the 21st century is not population growth. The greatest challenge is managing quality of life in a period of demographic decline.”

The entire system of modern Europe — pensions, schools, roads and hospitals — was designed for growing populations. But that assumption no longer holds. Fertility in most European countries remains persistently below replacement level. Projections towards 2100 point to populations that are substantially smaller and significantly older.

Adaptive Demography Theory (ADT) does not deny that declining fertility is a serious challenge. The Institute studies it in depth. But ADT builds a parallel field of knowledge: what happens when demographic trends remain unfavourable? How do we organise a high-quality, humane and sustainable life in a demographically shrinking Europe?

Three phases
of demographic contraction

The Institute is developing a three-phase conceptual model describing the transition from the present day to the end of this century. Each phase requires a different approach to managing space, services and communities.

I
Today · ~2 million

Early warning

The system still works. Schools are open and infrastructure is maintained. Yet the first symptoms are already visible.

Empty villages and branch schools
Labour shortages
Growing loneliness among older people
Unrealised motherhood
II
Mid-century · ~1.5 million

Structural adaptation

Schools consolidate, healthcare introduces mobile services, and new construction is no longer the central priority.

Regional education centres
Mobile clinics and telemedicine
Renovation before new construction
Intergenerational sharing of space
III
End of century · ~1 million

Paradigm shift

The question is no longer “how do we build?”, but “what do we no longer need?”

Demographic optimisation of infrastructure
Network of regional towns
Maintenance economy
Food self-sufficiency
Projects inštituta

Every project stems from
Adaptive Demography Theory

01
Observatory
Demographic Observatory
Phase 1 → all periods

Systematic monitoring of fertility, migration, ageing and partnership patterns. Development of proprietary indicators — ENR, RCEI and MDU — to anticipate change 20–30 years ahead.

02
Tool
Demographic Time Machine
Visualising all three phases

An interactive simulation showing the future of every Slovenian municipality from 2030 to 2100. A licensed SaaS platform for municipalities, ministries and schools.

03
Education
Demographic Academy · Schools
Preventive action, Phase 1

Workshops for secondary-school students on love, loneliness, the future of work and the demographic context of personal choices. No moralising — only empathy and evidence.

04
Policy
Demographic Academy · Political parties
Long-term planning

Half-day modules for political leadership and youth wings on the demographic impact of legislation, migration, the pension system and regional development.

05
Scenarios
Slovenia 2100
Phase 1 → Phase 3

Five detailed future scenarios: from 2 million to 1 million inhabitants, from high-tech Slovenia to self-sufficient Slovenia. A foundation for the White Paper planned by 2027.

06
Partnership
PartnerGap / Ona-On Plus
Drivers, Phase 1

Research into male demographic withdrawal (MDU) — the structural retreat of men from long-term partnership and parental roles — as one of the causes of unrealised motherhood.

07
Migration
Return of Slovenians from abroad
Mitigating factor, Phases 1–2

A catalogue of return policies and recommendations for ministries. The return of Slovenian diaspora communities is a short-term demographic buffer with high added value.

08
Community
Intergenerational communities
Response to Phases 2 and 3

Pilot models of community living addressing one of the greatest challenges of demographic contraction: loneliness. Developed in partnership with municipalities and housing cooperatives.

Theory za različna občinstva

For academics and decision-makers

Adaptive Demography Theory (ADT) enters the post-transition demographic phase as a complementary analytical framework. ADT does not replace pro-natalist policy; it builds a parallel branch of knowledge: adaptive demography.

Its key theoretical foundations include steady-state economics (Mill, Daly), the urban ecology of shrinkage, social capital theory (Putnam) and long-term scenario-planning methodologies.

  • ENR – Effective replacement fertility (adjusted coefficient)
  • RCEI – Reproductive Capacity & Environment Index
  • MDU – Male demographic withdrawal
  • Bela knjiga Slovenia 2100 (načrtovana 2027)

“Demographic adaptation requires a new discipline — as rigorous as the demography of growth, but with different questions and different tools.”

  • Methodologies: quantitative projections, scenario analysis, systems modelling
  • Potential partner institutions: EPC, Eurostat, SURS, EU DG EMPL
  • Publication pathway: three working papers + a White Paper by 2027

Slovenia in one hundred years: how will we live?

The demographic mathematics is clear: fewer children today means fewer adults tomorrow. We do not know exactly how many Slovenians there will be in 2100. Perhaps 1.5 million. Perhaps only one million.

This is not an apocalypse — it is a challenge. And a challenge calls for preparation, not panic.

The Institute for Demographic Future develops tools, scenarios and solutions that help communities, schools, companies and municipalities prepare for this change today.

  • Demography happens through private decisions — about partnership, parenthood and living arrangements
  • We make better decisions when we can see where things are heading
  • The goal is not to deny change — the goal is to live well despite it

“We are not speaking about an abstract future. We are speaking about your children’s schools, your parents’ pensions and the village in which you live.”

For clients and partners

Demography is not only an academic topic. It is a strategic risk and a business opportunity. Organisations that understand demographic trends make better long-term decisions.

The Institute offers a distinctive combined approach: analytical rigour, communication effectiveness and the practicality of a strategic advisory partner.

  • Demographic package for municipalities (diagnostics + scenarios + workshop)
  • Workshops for schools, faculties and companies
  • Licenca Demographic Time Machine
  • Advisory services for HR and strategic planning

“Every partnership begins with a free introductory conversation — because your demographic challenges are unique.”

Contact: info@demografskaprihodnost.si
www.demografskaprihodnost.si

Interactive tool

Demographic
Time Machine

Select a municipality and a year — the system displays projections for population, schools, healthcare needs and infrastructure.

Select region
Select year

The Demographic Time Machine is under development. The data shown are illustrative projections based on existing demographic trends and Eurostat methodologies. The full platform is planned for 2026.

Projection for year
2050
−18%
population change
52 years
median age
−22%
need for schools
+64%
need for elderly care
Ljubljana, 2050 projection · Source: IDF / Eurostat baseline
Commercial services

Packages for partners
and clients

🏘️
Demographic package for municipalities
Analytics + advisory

Diagnosis of demographic conditions, projections to 2075, scenarios for infrastructure and public services, and a workshop with the leadership team.

4–6 weeks · Report + workshop
💼
Advisory for companies
HR & strategic planning

Demographic projections for your sector, labour-market analysis and strategies for attracting talent in demographically shrinking regions.

Individually agreed
🖥️
Time Machine licence
SaaS platform

Institutional access to an interactive platform for visualising demographic projections. Suitable for ministries, media and educational institutions.

Annual subscription · from 2026

We are building knowledge
Europe urgently needs.

The Institute for Demographic Future invites partnership with all organisations, institutions and individuals who understand that the demographic future is a shared responsibility.

info@demografskaprihodnost.si www.demografskaprihodnost.si Nazaj na raziskave