Benjamin Reilly makes an important contribution to the debate on the appropriate institutional design of electoral systems for mitigating conflict and sustaining democracy in ethnically plural societies. The dominant position in this debate posits the importance of proportional representation (PR) systems. An alternative position, less widely accepted largely because of an ostensible absence of empirical examples, posits the importance of majoritarian preferential systems that encourage cross-ethnic vote pooling. Reilly extends this debate by drawing on heretofore unknown or understudied cases to examine the operation of both majoritarian (the alternative vote or AV and the supplementary vote or SV) and proportional (single-transferable vote or STV) preferential systems in different social contexts and in different elections (legislative and presidential).