Warren Buffett is considered one of the most successful investors ever with a current net worth over $100 billion. He became a disciple of renowned investor Benjamin Graham while studying at Columbia, later starting his own investment partnerships in the 1950s. His defining investment was acquiring New England textile firm Berkshire Hathaway in 1965, using it as a vehicle to purchase stocks and acquire companies via equity stakes.As Buffett evolved from Graham's "cigar butt" investing approach to focusing on high quality companies, Berkshire itself transformed into a powerhouse conglomerate with wholly owned subsidiaries in insurance, energy, manufacturing and consumer goods. Buffett also formed lifelong friendships and symbiotic partnerships with people like Charlie Munger and Bill Gates. His investing success is underpinned by a rational approach focused on intrinsic value, margin of safety and holding companies indefinitely so winners compound.Despite the immense wealth created, Buffett leads a modest, frugal lifestyle and has pledged to give away 99% of his fortune to philanthropy in an effort to address wealth inequality. This commitment to see money as a vehicle for change rather than luxury encapsulates his ethical foundations.In terms of Berkshire succession planning, Buffett has decentralized operations and empowered business managers so operations can continue without him. He has also identified portfolio manager Todd Combs and Vice Chairman Greg Abel as key figures who now handle many capital allocation duties. As Buffett says, Berkshire represents a community beyond just himself, so the culture should endure past his stewardship.Ultimately, Buffett's legacy includes unrivaled value creation via Berkshire stock, his long-term investing wisdom which educates average investors, serving as a model for wealth redistribution through philanthropy, acquisition and oversight excellence, and providing a blueprint for long-horizon, community-focused capitalism.