So WI Liberia in the 1980s doesnt go through the terrible civil war. Could Liberia be a second world nation. OTL the civil war destroyed many healthcare facilities, industries, and population. Without Civil war could Liberia become a second world or first world country in Africa.
"Second World" does not mean an economic development between the First and Third World. In fact, none of them are technically definitions of economics development.
First World - The anti-Communist West.
Second World - The Communist Bloc.
Third World - The unaligned countries.
The terms are a relic of the Cold War. Because the First World typically represented the developed democracies of Europe, North America, and Japan, it became shorthand for "economically developed." Because the Third World was typically the decolonized countries, it became shorthand for "poor, undeveloped countries."
Nevertheless, I think everyone understands what you mean. I wanted to bring this up because it is a common error.
Even without the civil war, Liberia faces a lot of challenges. It does not have any of the signs typical of the Asian Tigers/Newly Industrializing Economies (NIEs). It does not have mass education and high levels of literacy, a technocratic elite, low levels of corruption, or a real vision to develop. The existing elite was extraordinarily selfish. It would take a lot of changes in Liberia's politics to build the necessary infrastructure for real, widespread economic growth.
I think we would see a country with very unequal development, although if we keep preventing any civil war, then we must be seeing some kind of improvement in the condition of the "native" Liberians as opposed to the descendents of former slaves. We might see an economy that is far better than most Africans, but probably no better than most Latin American countries, and far behind the NIEs.