Why are organisations resistant to change?

Assignment 1
A 2000 word assignment:
Why are organisations resistant to change?
Critically discuss this question in the light of your knowledge of organisation
development and your experiences in practice.

And Assignment 2
A 2000 word assignment:
The question to ask is not what if I spend all this time and money training and
developing a person and they leave? Rather it should be what if I dont spend any
money on their training and development and they stay? (A quote from a change
consultant)
Clegg, S, Kornberger, M and Pitsis, T (2008) Managing and Organisations London:
Sage
Critically discuss the principles of human resource development (HRD) and consider
the above quotation in the light of your experiences in practice.