“We want an inclusive government because that will guarantee a stable government in the country. Otherwise we will have fighting,” Shaheen said. The Taliban has so far rejected official negotiations with the Ghani administration, labeling it a "stooge" government.
Shaheen did not elaborate on what an "inclusive" government means in practice or whether it amounted to a democracy. The Taliban has misled the media in the past and has consistently rejected taking part in elections and called on Afghans to boycott votes.
Shaheen also said that shortly after signing the deal with the U.S., the Taliban would take part in an "intra-Afghan" negotiation with the aim of establishing a government in which all Afghans can participate. He added that the Taliban would consider the Afghan government as one faction of the non-Taliban side but would still not recognize it as legitimate.
From January 2009, when the United Nations began a systematic documentation of civilian casualties, to September, some 34,000 civilians were killed as a result of the armed conflict.
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"Everyone knows that it is a meaningless war in Afghanistan," Shaheen said.
Analysts caution that the militants — whose harsh and austere rule ended in 2001 when American troops invaded the country after the group sheltered 9/11 architect Osama bin Laden — have made similar but vague statements in the past about engaging with Afghan society and not seeking a monopoly on power. In practice, they warned, negotiations may not play out as Shaheen suggests.
The question remains what will happen during these talks, said Ashley Jackson, a research associate at the Overseas Development Institute, a London-based think tank.
"Will fighting continue between Taliban forces and the Afghan government? Will they try and take more territory while those talks are going on, or will be there some sort of peace or some sort of violence reduction?" she said.
But, Jackson said, these latest comments represent an increasingly concrete acknowledgment that the Taliban may be willing to engage with Ghani's government and negotiate a political settlement.
Graeme Smith, a senior consultant for the International Crisis Group, which aims to prevent and resolve deadly conflict, called Shaheen's comments "fairly momentous."
“The Taliban has always vowed that they would never negotiate the political future of Afghanistan while there were foreign boots on Afghan soil,” he said.
Now the Taliban appears to be saying that they will do just that, he added, because they will be sitting down and beginning peace negotiations, including with members of the Afghan government, before U.S. troops would have physically left Afghanistan.
“You can see the Taliban forming their thinking more and more clearly of the next steps of the political process,” he added.
Whether or not an "inclusive government" for all Afghans can be achieved in practice is a different issue, however.
The Taliban's claims come after years of restricting girls' education and stopping women from working outside of the home unless accompanied by a male relative. And while in power, the Taliban persecuted religious and ethnic minorities — particularly Shiite Hazaras.
But before so-called intra-Afghan talks can start, the U.S. and Taliban must reach a deal. Last week, the U.S. special envoy said the U.S. was "taking a brief pause," apparently in reference to the negotiations after the Taliban attempted to breach a U.S. airfield.
Shaheen told NBC News that the Taliban would guarantee women’s right to work and to study as is enshrined in Islamic law, but he did not give details on what this entails. While the Taliban has never explicitly forbidden women from going to school or work, in reality it often limits girls to only a few years of schooling or bans them from education altogether, according to Human Rights Watch.
Ali Arouzi and Mushtaq Yusufzai reported from Doha, Qatar; Saphora Smith from London; and Ahmed Mengli from Kabul.
Saphora Smith is a London-based reporter for NBC News Digital.
Ali Arouzi is NBC News' Tehran bureau chief and correspondent.
Mushtaq Yusufzai is a journalist based in Peshawar, Pakistan.