Describe your personal theory of human development across the lifespan. From your personal experience, what are some of the most important developmental milestones or achievements associated with the following stages of life:

infancy,
childhood,
adolescence,
adulthood, and
older adulthood.
What cultural variables in your own life do you think influence what you see as the key milestones in each developmental stage? You do not need to reference professional or scientific literature for the purpose of this short essay, as it draws entirely from your own viewpoints and experiences.