In June this year, the presidents of Kenya, Uganda and Rwanda met in Kampala and then announced a plan with definite timelines to speed up integration in the East African Community.
They have since met again in Mombasa and will be in Kigali soon. There were two reactions to this development.
The first was that the three were creating a two-lane integration process – one for those who wanted to sprint and another for dawdlers.
The second was a signal that if the other two could not make up their mind about how they wanted the East African Community to move forward, they risked being left behind.
In both cases, depending on where one stood on the issue, the action of the three countries was said to be leading to the possible isolation of Tanzania and Burundi or to pulling them along to join the others.
Tanzania shrugged and scoffed at such suggestions, saying they were inconsequential and that the trio could go ahead with their plans. Some Tanzanians even claimed that not much could be done without their country since it was the regional centre of gravity.
That initial disdainful dismissal of what has come to be known as the tripartite arrangement has given way to realism. Now Tanzania and Burundi are chafing at being left out by the other three partner states.
The prospect of isolation, or at any rate being left behind, is looming.
Indication that this change of attitude is happening came from a recent meeting of the East African Council of Ministers in Arusha.
A lot of good may come from the decisions of Presidents Paul Kagame, Yoweri Museveni and Uhuru Kenyatta to go it alone. They are now likely to pull along the other reluctant partners after all.
In many senses both the actions of Kenya, Uganda and Rwanda and the new response by Burundi and Tanzania had to happen at some point. Exasperation among East African Community enthusiasts with Tanzania for its slow pace towards integration was bound to trigger some reaction or other.
It is not a coincidence that the three countries chose to address the very areas where Tanzania has been less cooperative: single customs territory, non-tariff barriers, free movement of people, goods, services and capital, infrastructure and political federation.
For long the excuse of the Tanzanian leadership was that their citizens should not be stampeded into faster integration because there was no urgency and in any case they needed time to grasp the concept.
As it now turns out, that was only a pretext. Ordinary Tanzanians now recognise that the other three partner states are determined to go ahead without them.
The prospect of achieving what they have set out to do is very real. The likelihood of isolation, or at the very least being left behind, is also becoming real and is being voiced by ordinary people.
Politicians are now picking it up because it is becoming a serious issue and likely to make them climb down from their arrogant position.
This change of attitude has obviously been forced on the Tanzanian leadership. They now realise they might lose out if the other countries establish a single customs territory and also start using a single-tourist visa. And despite repeated denials, plans to build the oil and transport infrastructure in the northern corridor will significantly affect the volume of cargo along the central corridor.
Already, there are examples of a climb down. Tanzania unilaterally hiked charges on Rwandan-registered trucks ferrying transit goods through its territory.
Rwanda retaliated and raised charges on Tanzanian trucks. Tanzania cried foul but in the end backed down and reduced the charges they had set without consultation.
The decision was not, of course, a result of good neighbourly feelings. It was the product of hard-nosed business calculations. Tanzania has more trucks doing business from the port of Dar es Salaam to Kigali and on to northern Burundi and the Democratic Republic of Congo. It was therefore bound to lose from a protracted tariff war.
The same considerations are probably coming into play with regard to the tripartite arrangements between Kenya, Rwanda and Uganda. The fear of loss and isolation will make the Tanzanian leadership find their East African feet and recognise that it is in their best interest to travel together with their partners and at the same pace.
They might yet rediscover the integrationist spirit of their predecessors. Historically, ideologically and even in practical terms, Tanzania was the most integrationist of the East African countries.
This owed in large measure to Mwalimu Julius Nyerere’s Pan-Africanism and de-ethnicisation of the country, and the fact that the country was the home of nearly all liberation movements in East, Central and Southern Africa.
About ten years ago, all that began to change. We began to see the development of an inward looking nationalism and dangerous flashes of xenophobia.
That could yet change again and the previous enthusiasm for a united East Africa return. The fear of isolation and loss of business may bring that about.
The writer is a political commentator based in Kigali