An emergency tends to focus one’s mind and energies and to clarify one’s priorities.
If a dangerous fire breaks out in a home, the inhabitants thereof will lay aside their quarrels, postpone their other activities, and together get to the task of putting out the flames. If a nation is invaded by an aggressor, politicians will quickly forget their internal squabbling and put off their legislative programs in order to work together for the shared purpose of repulsing the enemy.