To promote information sharing and support countries to meet their obligations, the United Nations Environment Programme (UNEP), in partnership with the University of Eastern Finland has organized annual training courses on MEAs since 2004. This volume of the Review contains a compilation of papers from the 17th Course, presenting a valuable collection of lessons and insights drawn from the Course to a wider audience. The Review covers a variety of topics on the post-2020 biodiversity agenda, canvassing the history and current situation of the agenda; progress towards agreement on marine biodiversity of areas beyond national jurisdiction; biodiversity and international human rights; biodiversity protection and emerging technologies; and the rise of ecological restoration law. The Review also provides insights on legal drafting skills in MEA negotiations, rules of procedure and virtual MEA negotiations.