How many leaders has the SDLP had since 1998?

The Social Democratic and Labour Party (SDLP) has indeed had four leaders since 1998, making the correct answer related to that context. Specifically, after the party's leader at that time, John Hume, who was pivotal in the peace process, the subsequent leadership changes were notably influenced by the evolving political landscape in Northern Ireland. The leaders that followed included Mark Durkan, who led from 2001 to 2010; Alasdair McDonnell from 2011 to 2015; and Colum Eastwood, who took over in 2015. Each leader faced different challenges and opportunities, particularly in response to the dynamics with other political parties and the shifting voter base.

The historical significance of these leadership changes is connected to the SDLP's role in advocating for social democracy and its commitment to reconciliation and integration in a post-conflict society. This provides a comprehensive understanding of the SDLP's evolution in leadership over recent decades.