A NASA astronaut, Joan Higginbotham is a trailblazing electrical engineer who in December 2006, flew aboard Space Shuttle Discovery to become the third African American woman to travel into space. Over the nearly 13-day mission, she joined the seven-member crew to continue construction of the International Space Station (ISS), embarking on four space walks and operating the station’s robotic arm. Sharing captivating insights from her 20-year distinguished career with NASA, Higginbotham inspires audiences with her personal journey of breaking barriers into space and beyond. Taking groups aboard the International Space Station and sharing her lessons-learned along the way, she highlights the keys to succeeding in her missions – including preparation, perseverance, and never giving up – and how these tactics can be applied to any endeavor.

Marga Hoek is a member of Thinkers50, she is that rare combination: a true visionary on sustainable business and capital and a successful, innovative business leader who understands and applies the commercial realities of business. Operating at the highest level with ministers and presidents, Marga is a global voice for G20, G7 Climate Change and Cop 23 and a regular contributor for prestigious, global media like Forbes Magazine, Fortune and The Huffington Post. Her latest book The Trillion Dollar Shift, on the business opportunities of the Sustainable Development Goals, received an international, gold medal.

Andrew B. Busch is the Editor-in-chief for the global market and public policy newsletter, “The Busch Update.” He is regular panelist on CNBC’s new show, “Money in Motion” that appears every Friday. His views can be found on www.andrewbusch.com as well as CNBC.com. He is a recognized expert on the world financial markets and how these markets are impacted by political events.

Trevor Williams served as Chief Economist at Lloyds Bank for over a decade. Now an author, academic and consultant, he analyses the key trends and policies that shape the economy and markets. From energy and climate to how companies use their data to understand the wider economy, he brings clarity and relevance to an often complex and abstract field.

Alongside Sunday Times responsibilities and columns in Professional Investor and Industrial Review, David is a prolific book-writer. In speeches David likens low oil prices to a major tax cut, and distinguishes between good (UK) and possibly bad (Eurozone) deflation. He might also reveal the latest findings of his own Skip Index, a reliable indicator of the state of the domestic economy.

Philippe Legrain is a critically acclaimed thinker and communicator with high-level policy experience. He is a senior visiting fellow at the London School of Economics’ European Institute, the founder of Open Political Economy Network (OPEN), an international think-tank, and a columnist for Project Syndicate, Foreign Policy and other international media outlets. Previously, he was economic adviser and the head of the team providing strategic policy advice to European Commission President José Manuel Barroso, special adviser to World Trade Organisation Director-General Mike Moore and trade and economist correspondent for The Economist. His four best-selling books include European Spring: Why Our Economies and Politics are in a Mess – and How to Put Them Right, which was among the Financial Times’ Best Books of 2014.

June Sarpong has enjoyed a 20-year career which has already seen her become one of the most recognizable faces of British television, as well as being one of the UK’s most intelligent and dynamic young hosts. June is a media phenomenon and is the only host of her generation that is equally comfortable interviewing politicians, celebrities and members of the public. June was awarded an MBE (Member of the British Empire) on the Queens 2007 new year’s honours list for her services to broadcasting and charity, making her along with Princess Anne’s daughter Zara Phillips one of the youngest people to receive an MBE.

John is a respected organisational psychologist, best-selling New York Times author and CEO of APS (Amaechi Performance Systems). John partners with organisations to help leaders move from being transactional to transformational. He focuses on improving performance, solving intractable people problems and creates thriving workplaces despite the challenges and disruption of the modern world. Prior to founding his own firm, John spent several years as a professional athlete, becoming the first Brit to play in the National Basketball Association (NBA).

Jonathon Porritt, Co-Founder of Forum for the Future, is an eminent writer, broadcaster and commentator on sustainable development. Established in 1996, Forum for the Future is now the UK’s leading sustainable development charity. The Forum has a growing presence in the United States, India, Hong Kong, Singapore and Malaysia. In addition he is a Non-Executive Director of Willmott Dixon Holdings, a Trustee of Ashden, and a Director of Collectively (an online platform celebrating sustainable innovation). He was formerly Director of Friends of the Earth, co-chair of the Green Party and as Chairman of the UK Sustainable Development Commission until 2009, he spent nine years providing high-level advice to Government Ministers. Jonathon was installed as the Chancellor of Keele University in February 2012. He is also Visiting Professor at Loughborough University and UCL. Recent books are ‘Capitalism As If The World Matters’ (2007) and ‘The World We Made’ (2013) - which seeks to inspire people about the prospects of a sustainable world in 2050.