It's funny how stupid you are.
Barter is simply trade and can occur within any sociopolitical setting, regardless of other economic systems in place.
Capitalism is a system in which the proletariat sell their labour power/themselves as servants to the capitalists who own the means of production at a fraction of the surplus value they will create. It is a system rooted in and based upon exploitation and the immediate dependency of the proletariat upon the capitalist for his survival, which came about through the primitive accumulation of capital and the use of force to subjugate the masses in the third world and also through the early monopolies and trusts which created the modern class distinctions with the coming of the industrial revolution.
There is also the capitalist stage of socioeconomic development within a civilization, which I explained to you several pages back.
Capitalism has time and again proven that it necessarily tends towards the rise of an aristocratic oligarchy and the brutal enslavement of the world proletariat. This was once known as colonialism and eo-colonialism, although today it;s given the politically correct name 'outsourcing' when those to be exploited are out of sight and out of mind to the consumer class.
The consumer class, in turn, arose from the proletariat with the socialist reforms that were achieved in the West before technology enabled multinational corporations to more effectively circumvent the authority of nation-states they could not wholly control.
That you're wholly ignorant of both historical and current trends is painfully obvious.