Was the Great Famine the turning point in attitudes towards Irish nationalism between 1815 and 1937?

The Great Famine (1845-48) was possibly one of the most cataclysmic events of the 19th Century marking a significant turning point in Irish nationalism. The rise to prominence of the Catholic Association, with Daniel O Connor as its leader, signified the emergence of a nation-wide organization promoting Irish nationalism by constitutional means. Despite some early success and the growing popularity of the Association, the disastrous impact of the Famine put a stop to further developments in the short term. Longer term, the Famine has come to be viewed as a critical turning point in the changing of attitudes and the development of a burgeoning Irish nationalism. Historians have said of the Famine that it was, “the most tragic famine in modern British history”, having a “shocking, demoralizing impact”. Kee goes further by suggesting the Famine should be read as "a form of genocide engineered by the English against the Irish people." Ultimately the Famine provided the platform for militant activity against British Rule but in the shorter term it was also the catalyst for the expression of other nationalist feelings, some of which took on a greater constitutional outlook. The high point of cultural nationalism came with the splitting of the Irish Parliamentary Party (IPP) and the formation of the Gaelic Athletic Association (GAA) in 1884. This growth of cultural nationalism was expressed by a growing interest in Irish history; its language, sport, and folklore. The fomenting of militant nationalism stemmed from increasing disillusionment with the IPP and its continuing failure to achieve Home Rule. In turn this impacted on the renaissance of the Irish Republican Brotherhood (IRB) and the birth of Sinn Féin. Militant nationalism culminated in the Easter Rising