Part of the Main dissent:
"Justice Stevens authored the main dissent which is basically predicated on the premise that the 2nd Amendment does not grant individual rights, but grants collective rights for militia purposes.
The question presented by this case is not whether the
Second Amendment protects a “collective right” or an
“individual right.” Surely it protects a right that can be
enforced by individuals. But a conclusion that the Second
Amendment protects an individual right does not tell us
anything about the scope of that right. . . . . . .
The Second Amendment was adopted to protect the
right of the people of each of the several States to main-
tain a well-regulated militia. It was a response to con-
cerns raised during the ratification of the Constitution
that the power of Congress to disarm the state militias
and create a national standing army posed an intolerable
threat to the sovereignty of the several States. Neither
the text of the Amendment nor the arguments advanced
by its proponents evidenced the slightest interest in limit-
ing any legislature’s authority to regulate private civilian
uses of firearms. Specifically, there is no indication that
the Framers of the Amendment intended to enshrine the
common-law right of self-defense in the Constitution.
Part of the second dissent:
Justice Breyer authored the second dissent whereby he agrees with Justice Stevens first point but also states that:
The majority’s conclusion is wrong for two independent
reasons. The first reason is that set forth by JUSTICE
STEVENS—namely, that the Second Amendment protects
militia-related, not self-defense-related, interests. These
two interests are sometimes intertwined. To assure 18th-
century citizens that they could keep arms for militia
purposes would necessarily have allowed them to keep
arms that they could have used for self-defense as well.
But self-defense alone, detached from any militia-related
objective, is not the Amendment’s concern.
The second independent reason is that the protection
the Amendment provides is not absolute. The Amendment
permits government to regulate the interests that it
serves. Thus, irrespective of what those interests are—
whether they do or do not include an independent interest
in self-defense—the majority’s view cannot be correct
unless it can show that the District’s regulation is unrea-
sonable or inappropriate in Second Amendment terms.
This the majority cannot do.