Go For Barocco, inspired by George Balanchine's ballets, is driven by the sheer logic of the movement.
Lenin, however, built up his policy not on the inclinations and views of the temporary leaders of the revolution, but on the interrelations of the classes and the logic of mass movements.
That reasoning became the defining logic of the fundamentalist movement, and prompted an effort by the Church's national body to force the New York Presbytery to affirm the fundamentals of the faith from its pulpits.
But the logic of the free movement of people is that the more open the borders internally, the more tightly external frontiers must be managed.
"It is the logic of a social movement transferred to the structure of government, and that has grave consequences," said Edson Nunes, author of "The Political Grammar of Brazil" and a professor of political science at Candido Mendes University in Rio de Janeiro.
That, at least, is the implicit logic of the populist movement.
If profits are high, then we can afford to take corporations down a peg or two, is the implicit logic of the populist movement.
In that context, it can seem hopeless: the logic of EU free movement is as remorseless as economic gravity, tipping the most mobile of the poor countries into the laps of the rich ones.
The Seventh was a statement of great nobility, its emotional trajectory immediate and superbly negotiated, the drama and logic of its single-movement structure admirably focused and taut.
It doesn't describe people like Ronald Reagan or Vladimir Putin, both of whom have sometimes been called "populist", but it does describe the logic of the parties, movements, and candidates, from the US's People's Party of 1892 to Marine Le Pen's Front National of 2016.
The ABC approach is often apparent in government initiatives, but it is also seen in the logic of the Transition Towns movement.
