How do practices change? To approach this in practice theory (PT) is a widely debated question. This article brings PT in conversation with the study of emotions in International Relations by considering the role of affect in practice changes. For it is affect that permeates the placiotemporal and bodily constellations during practice performances, continuously provoking changes in and through practices. In initiating this conversation, this article adds to current PT literature by arguing that world political transformations not only find their origin in external conditions, identified as such through individual reflection, but also in affective dynamics of the everyday. To elaborate this more theoretical argument, this article evolves against the empirical backdrop of dancing as an everyday international practice at the Congress of Vienna (1814–1815). Affect that permeated dances in Vienna not only substantiated changes in this practice but, with the waltz replacing the minuet as the preferred dance among international political decision-makers, also changes through it occurred. While the minuet embodied collective sentiments of a transboundary European elite, the waltz helped to further national imaginations of world politics.

做法如何改变？在实践中要达到这个目的，理论（PT）是一个受到广泛争议的问题。本文通过考虑情感在实践改变中的作用，将PT与国际关系中的情感研究进行了对话。因为在练习表演过程中会渗透到时间，身体上的星座，从而在练习中和练习中不断引起变化。在开始这种对话时，本文通过争论世界政治变革不仅发现其起源于外部条件（通过个人反思来确定这种外部条件），而且还发现其在日常的情感动态中的存在，从而增加了当前的PT文献。为了详细阐述这一理论上的论点，本文是在维也纳会议（1814-1815年）上作为日常国际惯例的舞蹈经验背景下演变而来的。维也纳舞蹈的渗透不仅影响了这种习俗的变化，而且随着华尔兹舞厅取代小礼堂成为国际政治决策者的首选舞蹈，这种变化也发生了。尖塔体现了欧洲跨界精英的集体情感，而华尔兹则有助于进一步激发各国对世界政治的想象。