Who is the two people that invented vehicle safety?

Vehicle safety advancements are attributed to many individuals, but two key figures are Nils Bohlin and Ralph Nader. Nils Bohlin, a Swedish engineer, invented the three-point seatbelt in 1959, which significantly improved passenger safety. Ralph Nader is an American consumer advocate whose book "Unsafe at Any Speed" (1965) sparked widespread awareness and reform regarding automobile safety standards, leading to significant regulatory changes.