William McDonough is an American architect, designer, and author known for his work in sustainable design. He co-authored the influential book, Cradle to Cradle: Remaking the Way We Make Things, which promotes a circular economy and environmentally friendly practices in manufacturing and architecture. McDonough emphasizes the importance of designing products and systems that are beneficial to both people and the planet. He is also the founding principal of William McDonough + Partners, an architecture and design firm that focuses on sustainable building practices. McDonough has received numerous awards for his contributions to environmental design and is a prominent advocate for integrating sustainability into everyday life and business practices.