Peter F Gallagher

Welcome to my Author Page

Peter F. Gallagher is the founder and architect of Saeculum Leadership®, a generational school of thought reframing leadership as a civic, moral, and evolutionary responsibility. He is a Top 4 Global Leadership Authority, the World’s #1 Change Leadership Thought Leader, and a 20‑book author whose work spans leadership, change, stewardship, and long‑arc institutional design.

Peter’s earlier body of work includes the Leadership of Change® series and the Change Management Body of Knowledge (CMBoK) Volumes 1–15, recognised globally for advancing practical organisational change implementation. His current focus is the Saeculum Leadership® Canon and the Saeculum Leadership® Body of Knowledge (SLBoK) — a multi‑volume doctrinal architecture defining the language, principles, and stewardship disciplines required for leaders to think and act across generational horizons.

Global Leadership & Change Expertise

For more than 40 years, Peter has advised boards, CEOs, and senior leadership teams in 40+ countries, helping leaders steward strategic, cultural, and organisational transformation. His work equips executives to:

• articulate long‑arc vision

• model the new way

• shape the conditions for sustainable change

• steward institutions beyond the present moment

Peter’s frameworks integrate philosophy, governance, anthropology, and operational discipline into a unified canon for long‑term leadership.

Leadership Philosophy

Peter’s philosophy is clear and demanding:

• Leadership is generational stewardship.

• Management preserves the present; leadership builds the future.

• Leaders shape possibility, not comfort.

• Leadership is the human expression of our evolutionary arc — the responsibility to create, protect, and transmit what matters.

Global Recognition

• Top 4 Global Leadership Guru (2026)

• #1 Global Thought Leader in Change Management (Thinkers360, 2020–2025)

• #1 Global Thought Leader in Business Strategy (Thinkers360, 2023–2026)

• leadersHum: #1 Change Management Guru to Follow (2022); Top 200 Voices in Leadership (2022 & 2023)

Qualifications

MBA (Distinction), Robert Gordon University

One of the global “First 500” Certified Change Management Professionals™ (ACMP®)

Former ASQ Certified Manager of Quality; previously held three PMI certifications

Author & Canon Builder

Peter has authored 20 books across leadership, change, stewardship, and organisational transformation. His works include:

• Saeculum Leadership® Canon

• Saeculum Leadership® Body of Knowledge (SLBoK)

• Leadership of Change® Series

• Change Management Body of Knowledge (CMBoK) Volumes 1–15

His workshop manuals and simulations have been used globally to develop leadership capability, behavioural change skills, and organisational transformation readiness.

Previous Roles & Memberships

Former Board Member, Association of Change Management Professionals® (ACMP®) Global & UK