Craigslist founder Craig Newmark is donating $100 million to bolster U.S. cybersecurity, addressing threats from foreign adversaries. Half will focus on protecting critical infrastructure, like power grids, while the rest will educate the public on cybersecurity hygiene. Rooted in his commitment to “repairing the world,” Newmark’s philanthropy reflects his drive to safeguard the nation, with plans to give away his entire fortune within his lifetime.