Berlin--communism was contained by splitting the city of Berlin between East and West instead of allowing the capital city to fall under the control of the USSR
Korea--the US with the United Nations partitioned Korea into North and South with the North under the influence of the USSR and the South under the influence of the West. The advance of the North was prevented and the partition remained following the Korea War.
Cuba--though Cuba became a communist nation, the US attempted overthrows and potentially an assassination of the communist leader Fidel Castro. When the USSR attempted to put missiles in Cuba, the US was able to negotiate and prevent the missiles.
William Wilberforce continued to work for the abolition of all slavery within the British Colonies. He joined the 'Society for Gradual Abolition' and, when the campaign intensified again in the 1820's and 30', he did as much as his failing health would allow.
The population in a developed country will be higher and a lot more stable
Equality of women he made their rights even less
