Jim McKelvey, cofounder of Square (now Block), is an entrepreneur, inventor, and investor whose work has reshaped modern payments and small-business commerce. A glassblower by training, McKelvey partnered with Jack Dorsey in 2009 to create Square’s iconic card reader after losing a sale because he couldn’t accept credit cards—sparking a multibillion-dollar fintech revolution. Beyond Square, he founded LaunchCode to expand access to technology careers and authored The Innovation Stack, distilling insights from building category-defining companies. Known for his product intuition, creative background, and commitment to economic empowerment, McKelvey remains a major force in American entrepreneurship.

Jack Dorsey, tech entrepreneur and cofounder of Twitter and Block (formerly Square), has been a defining figure in the evolution of social media and digital finance. As Twitter’s cofounder and longtime CEO, he helped shape modern online communication, while at Block he revolutionized mobile payments and financial inclusion through technology. Known for his minimalist leadership style and focus on decentralization, Dorsey has increasingly turned his attention to Bitcoin and blockchain innovation, positioning himself at the intersection of technology, finance, and social change.

Evan Clark “Ev” Williams is an American pioneer of the social internet. He co-founded Pyra Labs, created Blogger, served as CEO of Twitter (2008–2010), and launched Medium, a leading long-form publishing platform. A graduate by drop‑out who popularized blogging and micro‑blogging, he now leads the impact investment firm Obvious Ventures.