The 2002 Austrian Grand Prix changed everything. When Rubens Barrichello eased off exiting the last corner having - pitstops aside - led from start to finish, to gift victory to his Ferrari team-mate Michael Schumacher, team orders would never be the same again.
This egregious bait and switch, in which the watching world believed it was witnessing a great victory for the Brazilian, only for Schumacher to be handed his fifth win in six races, prompted global fury.
Barrichello gave Austria '02 win to Schumacher on the line © LAT
Schumacher and everyone in the team were shocked by the outcry that ensued. It ultimately led to the FIA instigating an unworkable ban on team orders that was binned at the end of 2010 in the wake of the first occasion on which it was seriously tested. After all, team orders were as old as the hills as far as grand prix racing was concerned. But so cack-handed was the timing of the swap, courtesy of Barrichello's desire to give away victory at the last possible moment, that the concept of the number-two driver was besmirched for good.
Look back half-a-century or so and attitudes were very different. As Froilan Gonzalez headed to Ferrari's first victory in a world championship grand prix at Silverstone in 1951, the Scuderia's lead driver Alberto Ascari retired with a gearbox problem and was offered the chance to take over the Argentinian's car. He declined, but it wouldn't have been unusual for him to have jumped in to score some points.