入世的湯川：以和平為志業

Toward One World: Yukawa’s Lifelong Pursuit of Peace

歷經二次世界大戰的震撼與反思後，湯川秀樹的重心逐漸轉向人類責任與世界和平的課題。1946年，世界各地的科學家與知識分子因憂慮國際間缺乏有效抑止戰爭的力量，發起「世界聯邦運動」。湯川秀樹對此理念深表認同，並積極參與其中。翌年，為促進建立「世界政府」而設立的「世界聯邦主義者運動組織」正式成立，他與妻子湯川澄子（湯川スミ）長年皆是成員，其中澄子更曾出任世界聯邦運動協會會長。
戰後的湯川秀樹不僅以物理學家的身分思索科學與人類的關係，也在書畫與詩文中寄託對世界和平的期許。他多次題寫「世界は一つ」（世界是一體）、「平和」（和平）等語。對和平理念的追求，貫穿了他晚年的思想與創作。

In the aftermath of World War II—with its profound shock and moral reckoning—Yukawa’s attention turned increasingly toward the ethical responsibilities of humankind and the pursuit of a lasting peace. In 1946, scientists and intellectuals worldwide initiated the World Federalist Movement out of concern that the international community lacked effective mechanisms to prevent war. Yukawa strongly identified with its ideals and became actively involved. The following year, the World Movement for World Federal Government was formally organized to advance the creation of a “world government.” Both Yukawa and his wife, Sumiko (Sumi) Yukawa, remained devoted members for many years; Sumi would later serve as president of the movement’s Japan chapter.
In the decades that followed, Yukawa reflected not only as a physicist but also as a humanist on the relationship between scientific progress and the future of humanity. In his calligraphy and poetic inscriptions, he often wrote phrases such as “The world is one” and “Peace,” revealing how the pursuit of peace became a thread running through his later thought and creative practice.