What were the migration patterns of early humans?

Geographically, Migration is the movement of people from one area to another. Depending on their age and how capable they are, this can be either good or bad, for example if they are quite old, say 45, it wouldn't be long before they became a dependent and not contribute to the economy. On the other hand if they are capable, say a doctor, they could actively help to boost the economy. In some areas that have a low number of international migrants, there are misconceptions within the community, for example that the migrants are all "Illegal aliens", or that they "steal jobs". Migrants that take up managerial positions can actually help to create jobs, whilst only a tiny percentage of migrants are illegal.