Chapter 1: https://www.marxists.org/archive/marx/works/1848/communist-manifesto/ch01.htm#007
Chapter 2: https://www.marxists.org/archive/marx/works/1848/communist-manifesto/ch02.htm
Chapter 3: https://www.marxists.org/archive/marx/works/1848/communist-manifesto/ch03.htm
Chapter 4: https://www.marxists.org/archive/marx/works/1848/communist-manifesto/ch04.htm