Acknowledgements
The seminar was organized and hosted by the Waterworlds ERC project (www.waterworlds.ku.dk), led by Professor Kirsten Hastrup. Twenty invited participants, including the Waterworlds team, contributed to the discussion and further development of the papers. We are furthermore grateful for the contributions provided by the anonymous reviewers which greatly improved the papers. This special issue contributes to The Global Land Project (www.globallandproject.org).