Arrange the following periods in chronological order to illustrate the historical evolution of established parties:
1️⃣ Late 19th Century: Pragmatism under Disraeli
2️⃣ Early 20th Century: Emergence of Labour
3️⃣ Post-WWII: Domination and social welfare policies
4️⃣ Late 20th Century: Ideological shifts
5️⃣ 21st Century: New challenges, diverse base