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The Difference
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23 June 2026

What if the organizations we work for, volunteer for, or support had a much simpler way of understanding, measuring and maximizing the difference they make in the world? And what if we could cut through complication and put social impact at the heart of strategy?
This is easier to do than ever before, but very few organizations manage it. This is largely due to impact measurement being over-complicated, not central to strategy, and not prioritized. This book sets out to change that.
Matt Stevenson-Dodd is founder and chief executive of Trust Impact (www.trustimpact.com). With a 30+ year career as Chief Executive of some of the UK’s most socially impactful and innovative organizations, Matt is now trusted by the CEOs, boards, chairs and senior leaders of hundreds of organizations around the world to help find pragmatic solutions to understanding, measuring and maximizing their social impact.
Foreword – The Difference xiii
Introduction 1
Part One – Getting the basics right
1 ‘Do’ or ‘difference’? 11
2 Failure versus success 19
3 Three eras of impact measurement 31
4 Why doesn’t impact measurement work? 39
Part Two – Understand
5 Keeping things simple 49
6 Aligning on your core purpose 59
7 The impact fundamentals 69
8 Theory of Change 83
Part Three – Measure
9 Measuring what matters (not everything) 99
10 Social return on investment, social value and social impact 111
11 Changing the way we measure 117
12 More than questionnaires 123
13 Measuring the hard to measure 133
Part Four – Maximise
14 Why maximise? 145
15 The power of live data and data storytelling 149
16 Trust and transparency 167
Part Five – Individual differences by sector
17 Corporations and business 177
18 Public sector and government 185
19 Charities and social enterprise 195
20 Social-impact investing 203
21 Funders 211
22 Sport 219
Conclusion
23 The future of making a difference 227
What can I do next? 233
Acknowledgements 235
About the author 239
Index 241
Introduction 8
Part One - Getting the Basics Right 13
Chapter 1 - 'Do' Or 'Difference'? 15 Chapter 2 - Failure versus Success 21 Chapter 3 - Three Eras of Impact Measurement 29 Chapter 4 - Why Doesn't Impact Measurement Work? 35 Reflections and Next Steps 40
Part Two - Understand 41
Chapter 5 - Keeping Things Simple 42 Chapter 6 - Aligning On Your Core Purpose 49 Chapter 7 - The Impact Fundamentals 55 Chapter 8 - Theory of Change 64 Reflections and Next Steps 73
Part Three - Measure 74
Chapter 9 - Measuring What Matters (Not Everything) 75 Chapter 10 - Social Return On Investment, Social Value and Social Impact 84 Chapter 11 - Changing The Way We Measure 88 Chapter 12 - More Than Questionnaires 92 Chapter 13 - Measuring The Hard to Measure 98 Reflections and Next Steps 104
Part Four - Maximise 105
Chapter 14 - Why Maximise? 107 Chapter 15 - The Power of Live Data & Data Storytelling 110 Chapter 16 - Trust and Transparency 123 Reflections and Next Steps 127
Part Five - Individual Differences by Sector 128
Chapter 17 - Corporations and Business 129 Reflections and Next Steps 134 Chapter 18 - Public Sector and Government 135 Reflections and Next Steps 141 Chapter 19 - Charities and Social Enterprise 142 Reflections and Next Steps 147 Chapter 20 - Social Impact Investing 148 Reflections and Next Steps 153 Chapter 21 – Funders 154 Reflections and Next Steps 159 Chapter 22 – Sport 160 Reflections and Next Steps 164
Conclusion 165
Chapter 23 - The Future of Making a Difference 165
What Can I Do Next? 169
About The Author 171