Machiavellianism in psychology defines a personality of someone who is self centred in way that they only care about their own interest and will manipulate ,exploit and deceive others to get their way. This is a person who will trick you and manipulate you as long as it results to them getting what they desire or want.
Machiavellianism is amongst the personalities which are referred to as Dark Triad which includes narcissism and psychopath.
The immediate effect was that it divided the newly discovered land in South America along a line. With lands to the west of a line belonging to Castile and the land to the east belonging to Portugal.
