Blackjack's history began in 17th-century France as "Vingt-et-Un" and evolved significantly after reaching the U.S. in the 19th century, where the term "Blackjack" was introduced. Its popularity surged with the growth of Las Vegas in the mid-20th century, as casinos offered favorable rules to attract players. The 1960s marked the rise of card counting strategies, notably popularized by mathematician Edward Thorp, which prompted increased scrutiny from casinos. The late 1990s saw the advent of online Blackjack, further expanding its accessibility and appeal. Overall, Blackjack's history reflects its evolution alongside gambling trends and popular culture.