The conventional wisdom on the "Arab Spring" has long been that Tunisia is the one real success story; Yemen is too complicated, the former President is still influential, and the country still faces a great many challenges.
But yesterday's announcement that the country will be transformed into a federation of six autonomous regions is a good sign. The former South Yemen has been restless since its failed attempt at secession in 1994; the Houthi uprising in the north is another reminder of the country's centrifugal tendencies.
The southerners are not entirely happy; four of the six regions are in the former North Yemen and only two in the former South Yemen, but Aden will be given a special role in the southern regions. It won't solve all of Yemen's problems, perhaps even the South's complaints, but like the Tunisian constitution it is a reminder that when diverse political parties and social groups consult together, it is possible to move forward.