How important have Thai parties and intraparty factions been in Thailand's fast-evolving democracy? What role do they play today, especially since the enactment of the latest constitution? What has accounted for the fragmentation in Thailand's party systems and coalitions? How did Thai democracy allow for the rise to power of Thaksin Shinawatra? This article analyzes these questions, presents a theory of Thai coalition behavior, and offers some predictions for Thailand's democratic future.

Among the most interesting questions in Thai politics today is how to account for the rise and (until recently) the success of Thaksin Shinawatra and his Thai Rak Thai party. This article describes and analyzes some of the factors that contributed to the rise and success of Thaksin and Thai Rak Thai, arguing that neither Thaksin's personal assets nor the effects of the crisis are enough to explain Thai Rak Thai's rise and success. It focuses instead on the 1997 changes to Thailand's constitution. These institutional reforms were crucial because they altered Thailand's political-institutional landscape in fundamental ways. The reforms provided new opportunities and incentives for political actors that Thaksin and his party adeptly took advantage of. The argument presented is that the key reforms that helped pave the way for the rise of Thaksin and Thai Rak Thai were those reforms that helped reduce the number of political parties and that increased the power of the prime minister relative to coalition partners and intraparty factions.