Question

what changes have taken place in the Institution of marriage over the year

Answer 1

the intitution of marriage is continuesly evolving.  It has gone through many changes and redefinitions over the past 15 decades:

Most couples are made up of one woman and one man; some are of the same gender; or there are group marriages 

Most couples are of the same race. But it is only since the Civil War that African Americans were allowed to marry anywhere in the U.S. 

Other marriages are interracial. They were forbidden in some parts of the U.S. prior to 1967 when the U.S. Supreme Court declared miscegenation laws unconstitutional. Interracial marriages are now legal everywhere in North America; they are increasing in numbers.

Some couples are of the same religion; others are inter-faith. 

Some couples decide to have their own children; others attempt to adopt; others intentionally remain childless; still others are infertile. 

Some couples prefer to simply live together without ceremony or state license; others wish to stand up in front of friends and family, declare their love and commitment to each other, and be legally married in a secular or religious setting.

Answer 2

Answer:

Over the year the institution of marriage has changed. In old day when marriage was considered to be a Dharma now it is considered to be a lifelong companion. We have freedom to choose our own partner beyond the religion and caste. Inter caste marriages are becoming more prominent in India. Marriage couple can be of different caste and it is also acceptable in the family now. Love marriage with strong financial background is acceptable in the family now.