An important thing to note when using the concept of globalisation (indeed a bit of a confused concept) is not something that happened overnight or in the last twenty years, the concept of "globalisation" as in the greater interconnectivity between geographical and/or cultural areas in fields of communication, (political) ideas, connection between economical markets..etc (not necessarily a fixed definition) can be regarded as something that continuously occured troughout history.

You can see this on a local scale in the middle ages, where previously isolated rural markets were connected through among other things improvement in transport capablilities and allowed for specialisation and the formation of cities and later industrialisation. You can see this in the colonialisation and later in the imperialism by certain states, and then back to decolonization.

This way i dont find much revolutionary ideas in the "new" concept of globalisation, the economic markets were already connected and the ideas were already spreading. In other words the steamship was way more important then the internet might ever be.

Also the presence of an globally connected free-market economy doesnt necessarily mean an increase in the economical prosperity or peace, it could mean poverty for the people and one of the causes cited for the start of world war 1 is the imperialism of European countries (lenin even said that imperialism was the highest form of capitalism and that it was to blame for world war 1)