William Procter and James Gamble, who were born in the UK and Ireland respectively, settled in Cincinnati and married sisters. Their father-in-law persuaded them to become business partners, and in 1837 they founded Procter & Gamble. Over the years, P&G has focused on innovation through R&D, adopted new marketing strategies like design-driven advertising and social media, and strived to reach new consumers globally through acquisition and product development.