The Socialist International is an international organization of socialist and social democratic parties all over the world. It is one of the most powerful organizations on Earth because many nations all over the world have very powerful or even ruling parties that are members of the Socialist International. It might surprise you who is a member of that group.
For instance, the PRI in Mexico, the AD in Venezuela, APRA in Peru, the National Liberation Party in Costa Rica and the Liberal Party in Colombia are all members (not that those parties are any good!), as is the PRD in Mexico, New Space in Uruguay, the PNP in Jamaica, the Socialist Parties in Albania, France, Belgium, Spain, Portugal, Chile, Uruguay and Yemen, the Labor Parties in the UK, Australia, New Zealand, Norway, Israel, Dominica, St. Kitts and Nevis and St. Lucia, the Social Democrats in Iceland, Finland, Sweden, Denmark, Germany, Austria, Switzerland, Bosnia, Croatia, Montenegro, Romania and Slovakia, PANOS in Greece, the Socialist Workers Party in Luxemburg, the Democratic Parties in Moldova, Slovenia and Serbia, the Democratic Party of Socialists in Montenegro, the People’s Party in Mongolia, the PUK in Iraq, the PPP in Pakistan, the PLO in Palestine, Congress in Nepal, the Progressive Socialist Party in Lebanon, Democratic Forum for Labour and Liberties in Tunisia on and on. Of course the Sandinistas in Nicaragua and parties like Frelimo in Mozambique, MPLA in Angola, ANC in South Africa, FRETELIN in East Timor, Polisario in the Sahrawi Arab Democratic Republic and SWAPO in Namibia are also members.
Socialism isn’t losing at all. Socialist and social democratic parties of various forms are either ruling or in ruling coalitions of many to most countries on Earth or they are large parties in the opposition. Socialism hasn’t failed at all. It won, it’s winning, and it will continue to win.