Thesis: A driver waiting at a traffic light waits for the cars coming from the other direction to pass by before making a left turn.
Antithesis: A driver waiting at a traffic light and wanting to make a left turn doesn’t wait for the cars coming from the other direction to pass by; as soon as the light turns green, the driver quickly makes a left turn without waiting.
Synthesis: A driver at a traffic light sees that a driver coming from the other direction wants to make a left turn, so the first driver doesn’t go when the light turns green; the first driver waits for the second driver to make the left turn; the drivers behind the first driver must wait as well.
Thus culture evolves: drivers get to make left turns more quickly and the drivers behind them don’t have to wait so long.
Or devolves: drivers have to wait while the seemingly polite driver in front of them waits for another driver to make a left turn; and what was a relatively simple rule of the road changes into something more complex.